/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:50:51,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:50:51,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:50:51,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:50:51,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 06:50:51,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 06:50:51,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 06:50:51,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 06:50:51,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 06:50:51,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 06:50:51,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 06:50:51,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 06:50:51,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 06:50:51,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 06:50:51,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 06:50:51,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 06:50:51,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 06:50:51,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 06:50:51,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 06:50:51,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 06:50:51,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 06:50:51,371 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:50:51,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:50:51,372 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:50:51,372 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:50:51,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:50:51,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:50:51,374 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:50:51,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:50:51,375 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:50:51,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:50:51,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:50:51,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:50:51,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:50:51,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:50:51,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:50:51,376 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:50:51,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:50:51,377 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:50:51,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:50:51,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:50:51,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:50:51,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:50:51,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:50:51,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:50:51,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:50:51,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:50:51,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:50:51,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:50:51,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:50:51,379 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:50:51,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:50:51,379 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:50:51,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:50:51,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:50:51,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:50:51,691 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:50:51,692 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:50:51,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl [2021-06-05 06:50:51,693 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl' [2021-06-05 06:50:51,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:50:51,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:50:51,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:50:51,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:50:51,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:50:51,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:50:51" (1/1) ... [2021-06-05 06:50:51,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:50:51" (1/1) ... [2021-06-05 06:50:51,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:50:51,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:50:51,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:50:51,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:50:51,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:50:51" (1/1) ... [2021-06-05 06:50:51,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:50:51" (1/1) ... [2021-06-05 06:50:51,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:50:51" (1/1) ... [2021-06-05 06:50:51,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:50:51" (1/1) ... [2021-06-05 06:50:51,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:50:51" (1/1) ... [2021-06-05 06:50:51,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:50:51" (1/1) ... [2021-06-05 06:50:51,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:50:51" (1/1) ... [2021-06-05 06:50:51,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:50:51,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:50:51,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:50:51,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:50:51,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:50:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:50:51,904 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:50:51,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:50:51,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:50:51,905 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:50:51,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:50:51,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:50:51,905 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:50:51,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:50:51,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:50:51,906 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:50:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:50:51,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:50:51,908 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:50:52,105 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:50:52,105 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:50:52,107 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:50:52 BoogieIcfgContainer [2021-06-05 06:50:52,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:50:52,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:50:52,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:50:52,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:50:52,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:50:51" (1/2) ... [2021-06-05 06:50:52,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7ac9ec and model type mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:50:52, skipping insertion in model container [2021-06-05 06:50:52,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:50:52" (2/2) ... [2021-06-05 06:50:52,114 INFO L111 eAbstractionObserver]: Analyzing ICFG mts-array.wvr.bpl [2021-06-05 06:50:52,135 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:50:52,135 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:50:52,136 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:50:52,136 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:50:52,197 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 06:50:52,223 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 06:50:52,268 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:50:52,269 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:50:52,269 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:50:52,269 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:50:52,269 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:50:52,269 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:50:52,269 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:50:52,269 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:50:52,284 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 06:50:52,313 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:50:52,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:52,324 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:52,324 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:52,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1113490327, now seen corresponding path program 1 times [2021-06-05 06:50:52,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:52,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516234979] [2021-06-05 06:50:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:52,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:52,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516234979] [2021-06-05 06:50:52,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516234979] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:50:52,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:50:52,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:50:52,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18833883] [2021-06-05 06:50:52,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:50:52,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:52,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:50:52,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:50:52,491 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:52,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:52,550 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-06-05 06:50:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:50:52,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:50:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:52,561 INFO L225 Difference]: With dead ends: 154 [2021-06-05 06:50:52,561 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 06:50:52,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:50:52,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 06:50:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-06-05 06:50:52,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 06:50:52,602 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-06-05 06:50:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:52,602 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 06:50:52,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 06:50:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:50:52,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:52,605 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:52,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:50:52,605 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:52,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2043191081, now seen corresponding path program 1 times [2021-06-05 06:50:52,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:52,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541961055] [2021-06-05 06:50:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:50:52,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:52,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541961055] [2021-06-05 06:50:52,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541961055] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:50:52,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:50:52,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:50:52,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176686275] [2021-06-05 06:50:52,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:50:52,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:52,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:50:52,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:50:52,659 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:52,704 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-06-05 06:50:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:50:52,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:50:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:52,711 INFO L225 Difference]: With dead ends: 158 [2021-06-05 06:50:52,711 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 06:50:52,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:50:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 06:50:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-06-05 06:50:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 06:50:52,738 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 06:50:52,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:52,739 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 06:50:52,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 06:50:52,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:50:52,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:52,741 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:52,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:50:52,741 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash -219246905, now seen corresponding path program 1 times [2021-06-05 06:50:52,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:52,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100662330] [2021-06-05 06:50:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:53,178 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-06-05 06:50:53,302 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-06-05 06:50:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:53,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:53,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100662330] [2021-06-05 06:50:53,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100662330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:53,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253715373] [2021-06-05 06:50:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:53,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:50:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:53,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:53,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 06:50:53,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:53,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:53,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:53,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:50:53,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:53,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:53,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:53,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-06-05 06:50:53,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:53,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:53,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2021-06-05 06:50:53,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:54,010 INFO L628 ElimStorePlain]: treesize reduction 54, result has 43.2 percent of original size [2021-06-05 06:50:54,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:50:54,016 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-06-05 06:50:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:54,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253715373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:54,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:54,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:50:54,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328503196] [2021-06-05 06:50:54,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:50:54,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:54,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:50:54,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:50:54,072 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:54,403 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 06:50:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:50:54,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:50:54,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:54,408 INFO L225 Difference]: With dead ends: 330 [2021-06-05 06:50:54,408 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 06:50:54,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 635.8ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:50:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 06:50:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 06:50:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 06:50:54,442 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 06:50:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:54,442 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 06:50:54,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 06:50:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:50:54,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:54,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:54,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 06:50:54,667 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:54,667 INFO L82 PathProgramCache]: Analyzing trace with hash -387055997, now seen corresponding path program 2 times [2021-06-05 06:50:54,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:54,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965759842] [2021-06-05 06:50:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:55,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:55,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965759842] [2021-06-05 06:50:55,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965759842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:55,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143784796] [2021-06-05 06:50:55,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:55,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:50:55,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:50:55,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:55,341 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:55,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:50:55,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:55,355 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:50:55,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-06-05 06:50:55,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:55,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:55,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:50:55,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:55,383 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:55,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 06:50:55,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:55,426 INFO L628 ElimStorePlain]: treesize reduction 49, result has 38.0 percent of original size [2021-06-05 06:50:55,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:50:55,432 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:31 [2021-06-05 06:50:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:55,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143784796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:55,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:55,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 06:50:55,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116596115] [2021-06-05 06:50:55,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:50:55,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:55,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:50:55,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:50:55,520 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:56,007 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 06:50:56,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:50:56,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:50:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:56,010 INFO L225 Difference]: With dead ends: 374 [2021-06-05 06:50:56,010 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 06:50:56,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 638.9ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:50:56,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 06:50:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 06:50:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 06:50:56,021 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 06:50:56,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:56,021 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 06:50:56,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:56,021 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 06:50:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:50:56,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:56,023 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:56,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 06:50:56,237 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:56,237 INFO L82 PathProgramCache]: Analyzing trace with hash -88282549, now seen corresponding path program 3 times [2021-06-05 06:50:56,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:56,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293232840] [2021-06-05 06:50:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:56,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:56,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293232840] [2021-06-05 06:50:56,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293232840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:56,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628241348] [2021-06-05 06:50:56,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:56,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:50:56,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:56,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:50:56,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:56,767 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:56,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:50:56,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:56,780 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:50:56,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2021-06-05 06:50:56,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:56,833 INFO L628 ElimStorePlain]: treesize reduction 38, result has 54.8 percent of original size [2021-06-05 06:50:56,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:50:56,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:56,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:56,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:50:56,862 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:173, output treesize:27 [2021-06-05 06:50:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:56,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628241348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:56,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:56,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:50:56,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192400278] [2021-06-05 06:50:56,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:50:56,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:56,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:50:56,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:50:56,910 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:57,182 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-05 06:50:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:50:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:50:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:57,184 INFO L225 Difference]: With dead ends: 296 [2021-06-05 06:50:57,184 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 06:50:57,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:50:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 06:50:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-05 06:50:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 06:50:57,192 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 06:50:57,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:57,192 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 06:50:57,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:57,192 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 06:50:57,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:50:57,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:57,193 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:57,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 06:50:57,409 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:57,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:57,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1482543051, now seen corresponding path program 4 times [2021-06-05 06:50:57,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:57,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687400838] [2021-06-05 06:50:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:57,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:57,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687400838] [2021-06-05 06:50:57,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687400838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:57,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982470232] [2021-06-05 06:50:57,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:57,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:50:57,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:57,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:50:57,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:57,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:57,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:50:57,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:57,937 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:57,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 06:50:57,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:57,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:57,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:57,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:50:58,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:58,015 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:50:58,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-06-05 06:50:58,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:58,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:58,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:50:58,066 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:73 [2021-06-05 06:50:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:58,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982470232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:58,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:58,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:50:58,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881942314] [2021-06-05 06:50:58,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:50:58,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:58,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:50:58,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:50:58,211 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:58,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:58,593 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 06:50:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:50:58,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:50:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:58,599 INFO L225 Difference]: With dead ends: 425 [2021-06-05 06:50:58,599 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 06:50:58,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 559.2ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:50:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 06:50:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 06:50:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 06:50:58,608 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 06:50:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:58,608 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 06:50:58,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:58,608 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 06:50:58,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:50:58,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:58,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:58,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:58,821 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1258502875, now seen corresponding path program 5 times [2021-06-05 06:50:58,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:58,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827278963] [2021-06-05 06:50:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:58,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:58,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827278963] [2021-06-05 06:50:58,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827278963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:58,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364941095] [2021-06-05 06:50:58,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:58,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:50:58,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:58,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:50:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:58,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364941095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:58,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:58,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:50:58,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598598472] [2021-06-05 06:50:58,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:50:58,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:58,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:50:58,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:50:58,997 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:59,428 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 06:50:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:50:59,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:50:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:59,434 INFO L225 Difference]: With dead ends: 619 [2021-06-05 06:50:59,434 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 06:50:59,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:50:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 06:50:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 06:50:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 06:50:59,446 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 06:50:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:59,448 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 06:50:59,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 06:50:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:50:59,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:59,449 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:59,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 06:50:59,665 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2060145577, now seen corresponding path program 6 times [2021-06-05 06:50:59,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:59,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011217109] [2021-06-05 06:50:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:59,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:59,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011217109] [2021-06-05 06:50:59,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011217109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:59,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630712366] [2021-06-05 06:50:59,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:59,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:50:59,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:59,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:50:59,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:59,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630712366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:59,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:59,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:50:59,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39673595] [2021-06-05 06:50:59,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:50:59,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:59,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:50:59,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:50:59,862 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:00,687 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 06:51:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:51:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:00,692 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 06:51:00,693 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 06:51:00,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 521.6ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:51:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 06:51:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 06:51:00,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 06:51:00,708 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 06:51:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:00,709 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 06:51:00,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:00,709 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 06:51:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:00,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:00,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:00,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 06:51:00,929 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:00,929 INFO L82 PathProgramCache]: Analyzing trace with hash -705917075, now seen corresponding path program 7 times [2021-06-05 06:51:00,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:00,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917382015] [2021-06-05 06:51:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:00,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:00,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917382015] [2021-06-05 06:51:00,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917382015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:00,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351761964] [2021-06-05 06:51:00,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:01,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:01,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351761964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:01,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:01,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:01,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962085868] [2021-06-05 06:51:01,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:01,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:01,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:01,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:01,134 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:01,888 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 06:51:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:51:01,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:01,893 INFO L225 Difference]: With dead ends: 951 [2021-06-05 06:51:01,893 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 06:51:01,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:51:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 06:51:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 06:51:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 06:51:01,905 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 06:51:01,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:01,905 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 06:51:01,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:01,905 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 06:51:01,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:01,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:01,906 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:02,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:02,129 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash -731730967, now seen corresponding path program 1 times [2021-06-05 06:51:02,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:02,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707483798] [2021-06-05 06:51:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:02,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:02,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707483798] [2021-06-05 06:51:02,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707483798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:02,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636341066] [2021-06-05 06:51:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:02,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:51:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:02,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636341066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:02,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:02,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:51:02,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190314219] [2021-06-05 06:51:02,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:51:02,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:51:02,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:51:02,275 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:02,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:02,394 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 06:51:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:51:02,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:02,397 INFO L225 Difference]: With dead ends: 669 [2021-06-05 06:51:02,397 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 06:51:02,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 06:51:02,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 06:51:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 06:51:02,409 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 06:51:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:02,410 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 06:51:02,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 06:51:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:02,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:02,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:02,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 06:51:02,625 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:02,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1168699675, now seen corresponding path program 8 times [2021-06-05 06:51:02,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:02,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917170235] [2021-06-05 06:51:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:02,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:02,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917170235] [2021-06-05 06:51:02,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917170235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:02,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627713868] [2021-06-05 06:51:02,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:02,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:02,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:02,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:02,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:02,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627713868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:02,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:02,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:51:02,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843606069] [2021-06-05 06:51:02,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:02,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:02,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:02,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:02,806 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:02,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:02,978 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 06:51:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:51:02,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:02,984 INFO L225 Difference]: With dead ends: 710 [2021-06-05 06:51:02,985 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 06:51:02,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:51:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 06:51:02,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 06:51:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 06:51:02,998 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 06:51:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:02,998 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 06:51:02,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:02,999 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 06:51:03,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:03,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:03,000 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:03,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:03,221 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:03,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1874657007, now seen corresponding path program 2 times [2021-06-05 06:51:03,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:03,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620157916] [2021-06-05 06:51:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:03,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:03,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620157916] [2021-06-05 06:51:03,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620157916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:03,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398403589] [2021-06-05 06:51:03,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:03,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:03,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:03,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:51:03,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:03,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398403589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:03,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:03,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:51:03,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603699781] [2021-06-05 06:51:03,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:51:03,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:03,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:51:03,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:51:03,350 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:03,446 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 06:51:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:51:03,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:03,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:03,450 INFO L225 Difference]: With dead ends: 830 [2021-06-05 06:51:03,450 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 06:51:03,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 06:51:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 06:51:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 06:51:03,466 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 06:51:03,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:03,466 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 06:51:03,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 06:51:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:03,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:03,467 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:03,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:03,681 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:03,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1073628723, now seen corresponding path program 9 times [2021-06-05 06:51:03,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:03,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111673192] [2021-06-05 06:51:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:03,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:03,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111673192] [2021-06-05 06:51:03,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111673192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:03,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548767353] [2021-06-05 06:51:03,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:03,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:51:03,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:03,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:03,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:03,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548767353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:03,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:03,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:03,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488658928] [2021-06-05 06:51:03,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:03,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:03,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:03,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:03,846 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:04,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:04,184 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 06:51:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:51:04,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:04,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:04,189 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 06:51:04,189 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 06:51:04,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:51:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 06:51:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 06:51:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 06:51:04,208 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 06:51:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:04,208 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 06:51:04,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 06:51:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:04,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:04,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:04,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 06:51:04,425 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1858542817, now seen corresponding path program 10 times [2021-06-05 06:51:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:04,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809621696] [2021-06-05 06:51:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:04,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:04,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809621696] [2021-06-05 06:51:04,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809621696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:04,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69272705] [2021-06-05 06:51:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:04,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:04,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:04,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:04,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:04,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69272705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:04,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:04,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:04,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417907883] [2021-06-05 06:51:04,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:04,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:04,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:04,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:04,611 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:05,076 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 06:51:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:51:05,076 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:05,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:05,082 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 06:51:05,083 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 06:51:05,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:51:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 06:51:05,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 06:51:05,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 06:51:05,104 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 06:51:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:05,104 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 06:51:05,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 06:51:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:05,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:05,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:05,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:05,329 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash 775520161, now seen corresponding path program 11 times [2021-06-05 06:51:05,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:05,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524647715] [2021-06-05 06:51:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:05,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:05,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524647715] [2021-06-05 06:51:05,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524647715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:05,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735645357] [2021-06-05 06:51:05,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:05,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:05,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:05,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:05,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:05,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735645357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:05,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:05,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:51:05,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944338804] [2021-06-05 06:51:05,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:05,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:05,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:05,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:05,497 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:05,725 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 06:51:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:51:05,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:05,729 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 06:51:05,729 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 06:51:05,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:51:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 06:51:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 06:51:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 06:51:05,750 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 06:51:05,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:05,750 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 06:51:05,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 06:51:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:05,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:05,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:05,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 06:51:05,960 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:05,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:05,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2048369017, now seen corresponding path program 12 times [2021-06-05 06:51:05,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:05,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555668011] [2021-06-05 06:51:05,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:06,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:06,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555668011] [2021-06-05 06:51:06,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555668011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:06,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206018092] [2021-06-05 06:51:06,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:06,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:51:06,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:06,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:06,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206018092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:06,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:06,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:51:06,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232178496] [2021-06-05 06:51:06,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:06,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:06,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:06,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:06,130 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:06,388 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 06:51:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:51:06,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:06,393 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 06:51:06,393 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 06:51:06,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:51:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 06:51:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 06:51:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 06:51:06,415 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 06:51:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:06,415 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 06:51:06,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 06:51:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:06,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:06,417 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:06,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:06,641 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1490304735, now seen corresponding path program 13 times [2021-06-05 06:51:06,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:06,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434679338] [2021-06-05 06:51:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:06,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:06,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434679338] [2021-06-05 06:51:06,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434679338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:06,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114727753] [2021-06-05 06:51:06,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:06,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114727753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:06,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:06,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:06,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133455991] [2021-06-05 06:51:06,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:06,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:06,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:06,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:06,784 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:07,134 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 06:51:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:51:07,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:07,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:07,140 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 06:51:07,140 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 06:51:07,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:51:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 06:51:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 06:51:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 06:51:07,163 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 06:51:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:07,164 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 06:51:07,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:07,164 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 06:51:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:07,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:07,166 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:07,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 06:51:07,377 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:07,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1541712485, now seen corresponding path program 14 times [2021-06-05 06:51:07,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:07,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289625798] [2021-06-05 06:51:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:07,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:07,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289625798] [2021-06-05 06:51:07,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289625798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:07,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368591482] [2021-06-05 06:51:07,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:07,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:07,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:07,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:07,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:07,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368591482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:07,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:07,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:07,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644247713] [2021-06-05 06:51:07,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:07,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:07,583 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:08,329 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 06:51:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:51:08,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:08,340 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 06:51:08,340 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 06:51:08,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:51:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 06:51:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 06:51:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 06:51:08,373 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 06:51:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:08,373 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 06:51:08,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 06:51:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:08,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:08,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:08,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 06:51:08,599 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:08,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1224350167, now seen corresponding path program 15 times [2021-06-05 06:51:08,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:08,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188185668] [2021-06-05 06:51:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:08,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:08,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188185668] [2021-06-05 06:51:08,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188185668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:08,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784402112] [2021-06-05 06:51:08,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:08,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:51:08,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:08,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:08,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:08,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784402112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:08,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:08,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:08,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877165971] [2021-06-05 06:51:08,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:08,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:08,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:08,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:08,777 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:09,469 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 06:51:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:51:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:09,477 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 06:51:09,477 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 06:51:09,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:51:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 06:51:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 06:51:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 06:51:09,510 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 06:51:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:09,510 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 06:51:09,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 06:51:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:09,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:09,512 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:09,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:09,735 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:09,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:09,735 INFO L82 PathProgramCache]: Analyzing trace with hash 936318707, now seen corresponding path program 16 times [2021-06-05 06:51:09,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:09,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108317787] [2021-06-05 06:51:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:09,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:09,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108317787] [2021-06-05 06:51:09,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108317787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:09,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119361072] [2021-06-05 06:51:09,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:09,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:09,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:09,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:09,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:09,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119361072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:09,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:09,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:09,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497377011] [2021-06-05 06:51:09,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:09,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:09,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:09,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:09,922 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:10,572 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 06:51:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:51:10,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:10,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:10,584 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 06:51:10,584 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 06:51:10,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:51:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 06:51:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 06:51:10,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 06:51:10,621 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 06:51:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:10,621 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 06:51:10,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 06:51:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:10,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:10,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:10,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 06:51:10,846 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:10,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:10,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2008635681, now seen corresponding path program 17 times [2021-06-05 06:51:10,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:10,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332350608] [2021-06-05 06:51:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:10,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:10,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332350608] [2021-06-05 06:51:10,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332350608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:10,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933327087] [2021-06-05 06:51:10,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:10,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:51:10,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:10,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:10,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:10,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933327087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:10,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:10,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:10,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701664575] [2021-06-05 06:51:10,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:10,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:10,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:10,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:10,972 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:11,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:11,515 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 06:51:11,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:51:11,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:11,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:11,521 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 06:51:11,521 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 06:51:11,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:51:11,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 06:51:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 06:51:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 06:51:11,551 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 06:51:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:11,552 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 06:51:11,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 06:51:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:11,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:11,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:11,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:11,769 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:11,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:11,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2817957, now seen corresponding path program 18 times [2021-06-05 06:51:11,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:11,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640608237] [2021-06-05 06:51:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:11,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:11,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640608237] [2021-06-05 06:51:11,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640608237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:11,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306395892] [2021-06-05 06:51:11,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:11,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:51:11,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:11,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:11,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306395892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:11,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:11,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:11,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395066503] [2021-06-05 06:51:11,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:11,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:11,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:11,942 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:12,612 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 06:51:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:51:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:12,619 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 06:51:12,620 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 06:51:12,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:51:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 06:51:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 06:51:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:12,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 06:51:12,650 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 06:51:12,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:12,650 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 06:51:12,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:12,650 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 06:51:12,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:12,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:12,652 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:12,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 06:51:12,875 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:12,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:12,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1052559437, now seen corresponding path program 19 times [2021-06-05 06:51:12,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:12,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703313810] [2021-06-05 06:51:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:12,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:12,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703313810] [2021-06-05 06:51:12,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703313810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:12,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661982603] [2021-06-05 06:51:12,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:12,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:13,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661982603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:13,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:13,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:13,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689515443] [2021-06-05 06:51:13,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:13,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:13,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:13,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:13,041 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:13,715 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 06:51:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:51:13,716 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:13,722 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 06:51:13,722 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 06:51:13,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:51:13,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 06:51:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 06:51:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 06:51:13,751 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 06:51:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:13,752 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 06:51:13,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 06:51:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:13,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:13,754 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:13,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 06:51:13,977 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1615861683, now seen corresponding path program 3 times [2021-06-05 06:51:13,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:13,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325285898] [2021-06-05 06:51:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:14,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:14,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325285898] [2021-06-05 06:51:14,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325285898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:14,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129655056] [2021-06-05 06:51:14,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:14,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:51:14,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:14,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:51:14,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:14,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129655056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:14,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:14,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:51:14,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517148541] [2021-06-05 06:51:14,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:51:14,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:14,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:51:14,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:51:14,089 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:14,163 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 06:51:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:51:14,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:14,165 INFO L225 Difference]: With dead ends: 929 [2021-06-05 06:51:14,165 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 06:51:14,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 06:51:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 06:51:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 06:51:14,179 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 06:51:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:14,179 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 06:51:14,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 06:51:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:14,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:14,181 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:14,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:14,397 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -685661939, now seen corresponding path program 20 times [2021-06-05 06:51:14,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:14,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105500139] [2021-06-05 06:51:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:14,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:14,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105500139] [2021-06-05 06:51:14,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105500139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:14,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157414559] [2021-06-05 06:51:14,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:14,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:14,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:14,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:14,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:14,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157414559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:14,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:14,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:51:14,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669118385] [2021-06-05 06:51:14,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:51:14,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:14,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:51:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:51:14,536 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:14,805 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 06:51:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:51:14,805 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:14,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:14,808 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 06:51:14,808 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 06:51:14,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:51:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 06:51:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 06:51:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 06:51:14,826 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 06:51:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:14,826 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 06:51:14,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 06:51:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:14,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:14,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:15,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 06:51:15,050 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:15,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:15,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1217017513, now seen corresponding path program 21 times [2021-06-05 06:51:15,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:15,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746774241] [2021-06-05 06:51:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:15,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:15,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746774241] [2021-06-05 06:51:15,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746774241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:15,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115763671] [2021-06-05 06:51:15,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:15,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:51:15,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:15,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115763671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:15,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:15,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:51:15,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349343744] [2021-06-05 06:51:15,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:51:15,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:15,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:51:15,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:51:15,176 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:15,421 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 06:51:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:51:15,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:15,424 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 06:51:15,425 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 06:51:15,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:51:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 06:51:15,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 06:51:15,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 06:51:15,445 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 06:51:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:15,445 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 06:51:15,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 06:51:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:15,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:15,447 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:15,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:15,661 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:15,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:15,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2131830039, now seen corresponding path program 22 times [2021-06-05 06:51:15,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:15,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787106061] [2021-06-05 06:51:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:15,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:15,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787106061] [2021-06-05 06:51:15,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787106061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:15,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974545968] [2021-06-05 06:51:15,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:15,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:15,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:15,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:15,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:15,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974545968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:15,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:15,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:51:15,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310838802] [2021-06-05 06:51:15,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:51:15,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:15,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:51:15,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:51:15,773 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:15,962 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 06:51:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:51:15,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:15,966 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 06:51:15,966 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 06:51:15,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:51:15,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 06:51:15,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 06:51:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 06:51:15,986 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 06:51:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:15,986 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 06:51:15,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 06:51:15,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:15,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:15,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:16,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 06:51:16,210 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:16,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1241435117, now seen corresponding path program 23 times [2021-06-05 06:51:16,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:16,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447102749] [2021-06-05 06:51:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:16,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:16,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447102749] [2021-06-05 06:51:16,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447102749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:16,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495437518] [2021-06-05 06:51:16,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:16,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:51:16,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:16,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:16,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:16,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495437518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:16,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:16,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:51:16,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843241625] [2021-06-05 06:51:16,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:51:16,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:16,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:51:16,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:51:16,323 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:16,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:16,542 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 06:51:16,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:51:16,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:16,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:16,544 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 06:51:16,544 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 06:51:16,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:51:16,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 06:51:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 06:51:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 06:51:16,563 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 06:51:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:16,563 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 06:51:16,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 06:51:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:16,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:16,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:16,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 06:51:16,781 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:16,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1243112745, now seen corresponding path program 24 times [2021-06-05 06:51:16,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:16,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374669593] [2021-06-05 06:51:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:16,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:16,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374669593] [2021-06-05 06:51:16,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374669593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:16,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24820048] [2021-06-05 06:51:16,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:16,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:51:16,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:16,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:16,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:16,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24820048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:16,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:16,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:16,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424761733] [2021-06-05 06:51:16,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:16,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:16,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:16,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:16,962 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:17,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:17,487 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 06:51:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:51:17,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:17,492 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 06:51:17,492 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 06:51:17,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:51:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 06:51:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 06:51:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 06:51:17,513 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 06:51:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:17,513 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 06:51:17,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 06:51:17,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:17,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:17,515 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:17,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:17,725 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1522949907, now seen corresponding path program 25 times [2021-06-05 06:51:17,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:17,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634569825] [2021-06-05 06:51:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:17,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:17,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634569825] [2021-06-05 06:51:17,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634569825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:17,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249000071] [2021-06-05 06:51:17,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:17,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:17,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:17,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249000071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:17,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:17,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:17,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439690125] [2021-06-05 06:51:17,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:17,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:17,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:17,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:17,895 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:18,387 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 06:51:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:51:18,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:18,390 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 06:51:18,390 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 06:51:18,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:51:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 06:51:18,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 06:51:18,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:51:18,425 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:51:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:18,426 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:51:18,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:51:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:18,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:18,428 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:18,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:18,628 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:18,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:18,629 INFO L82 PathProgramCache]: Analyzing trace with hash 637718967, now seen corresponding path program 26 times [2021-06-05 06:51:18,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:18,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393276044] [2021-06-05 06:51:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:18,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:18,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393276044] [2021-06-05 06:51:18,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393276044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:18,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536416570] [2021-06-05 06:51:18,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:18,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:18,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:18,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:18,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:18,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536416570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:18,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:18,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:18,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549411931] [2021-06-05 06:51:18,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:18,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:18,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:18,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:18,806 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:19,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:19,218 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 06:51:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:51:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:19,222 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 06:51:19,222 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 06:51:19,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:51:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 06:51:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 06:51:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 06:51:19,240 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 06:51:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:19,240 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 06:51:19,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 06:51:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:19,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:19,241 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:19,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:19,445 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1710035941, now seen corresponding path program 27 times [2021-06-05 06:51:19,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:19,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363231837] [2021-06-05 06:51:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:19,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:19,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363231837] [2021-06-05 06:51:19,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363231837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:19,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240176728] [2021-06-05 06:51:19,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:19,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:51:19,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:19,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:19,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:19,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240176728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:19,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:19,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:19,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449361252] [2021-06-05 06:51:19,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:19,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:19,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:19,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:19,598 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:19,969 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 06:51:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:51:19,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:19,972 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 06:51:19,972 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 06:51:19,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:51:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 06:51:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 06:51:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:51:19,991 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:51:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:19,991 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:51:19,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:51:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:19,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:19,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:20,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:20,201 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:20,202 INFO L82 PathProgramCache]: Analyzing trace with hash -295781783, now seen corresponding path program 28 times [2021-06-05 06:51:20,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:20,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278930982] [2021-06-05 06:51:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:20,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:20,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278930982] [2021-06-05 06:51:20,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278930982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:20,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559496562] [2021-06-05 06:51:20,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:20,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:20,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:20,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:20,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:20,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559496562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:20,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:20,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:20,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273234118] [2021-06-05 06:51:20,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:20,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:20,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:20,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:20,344 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:20,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:20,724 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 06:51:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:51:20,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:20,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:20,727 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 06:51:20,727 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 06:51:20,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:51:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 06:51:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 06:51:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 06:51:20,751 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 06:51:20,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:20,752 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 06:51:20,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 06:51:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:20,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:20,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:20,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:20,967 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:20,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1351159177, now seen corresponding path program 29 times [2021-06-05 06:51:20,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:20,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302061538] [2021-06-05 06:51:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:21,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:21,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302061538] [2021-06-05 06:51:21,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302061538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:21,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440797099] [2021-06-05 06:51:21,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:21,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:51:21,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:21,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:21,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:21,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440797099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:21,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:21,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:21,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358854336] [2021-06-05 06:51:21,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:21,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:21,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:21,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:21,122 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:21,488 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 06:51:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:51:21,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:21,490 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 06:51:21,490 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 06:51:21,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:51:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 06:51:21,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 06:51:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:51:21,512 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:51:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:21,512 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:51:21,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:21,512 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:51:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:21,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:21,514 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:21,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 06:51:21,735 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1252113, now seen corresponding path program 30 times [2021-06-05 06:51:21,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:21,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672662326] [2021-06-05 06:51:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:21,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:21,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672662326] [2021-06-05 06:51:21,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672662326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:21,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190582300] [2021-06-05 06:51:21,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:21,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:51:21,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:21,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:21,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:21,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190582300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:21,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:21,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:21,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143187308] [2021-06-05 06:51:21,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:21,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:21,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:21,875 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:22,202 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 06:51:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:51:22,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:22,205 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 06:51:22,205 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 06:51:22,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:51:22,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 06:51:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 06:51:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 06:51:22,222 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 06:51:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:22,222 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 06:51:22,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 06:51:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:22,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:22,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:22,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:22,425 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1073569087, now seen corresponding path program 31 times [2021-06-05 06:51:22,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:22,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671180724] [2021-06-05 06:51:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:22,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:22,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671180724] [2021-06-05 06:51:22,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671180724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:22,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183157534] [2021-06-05 06:51:22,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:22,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:22,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:22,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183157534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:22,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:22,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:22,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628972068] [2021-06-05 06:51:22,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:22,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:22,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:22,538 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:22,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:22,813 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 06:51:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:51:22,813 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:22,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:22,815 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 06:51:22,816 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 06:51:22,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:51:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 06:51:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 06:51:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 06:51:22,839 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 06:51:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:22,839 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 06:51:22,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 06:51:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:22,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:22,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:23,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 06:51:23,064 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:23,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:23,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1960561683, now seen corresponding path program 32 times [2021-06-05 06:51:23,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:23,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329445033] [2021-06-05 06:51:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:23,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:23,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329445033] [2021-06-05 06:51:23,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329445033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:23,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030516461] [2021-06-05 06:51:23,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:23,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:23,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:23,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:23,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030516461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:23,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:23,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:23,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36294827] [2021-06-05 06:51:23,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:23,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:23,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:23,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:23,213 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:23,435 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 06:51:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:51:23,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:23,437 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 06:51:23,437 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 06:51:23,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:51:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 06:51:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 06:51:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 06:51:23,451 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 06:51:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:23,451 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 06:51:23,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 06:51:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:23,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:23,453 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:23,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:23,653 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:23,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:23,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1288275347, now seen corresponding path program 33 times [2021-06-05 06:51:23,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:23,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777301189] [2021-06-05 06:51:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:23,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777301189] [2021-06-05 06:51:23,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777301189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254823429] [2021-06-05 06:51:23,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:23,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:51:23,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:23,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:23,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254823429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:23,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:23,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:23,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837718900] [2021-06-05 06:51:23,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:23,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:23,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:23,791 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:24,113 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 06:51:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:51:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:24,116 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 06:51:24,117 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 06:51:24,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:51:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 06:51:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 06:51:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 06:51:24,139 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 06:51:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:24,139 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 06:51:24,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 06:51:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:24,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:24,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:24,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 06:51:24,363 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:24,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1951314555, now seen corresponding path program 34 times [2021-06-05 06:51:24,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:24,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159229925] [2021-06-05 06:51:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:24,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:24,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159229925] [2021-06-05 06:51:24,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159229925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:24,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380728927] [2021-06-05 06:51:24,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:24,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:24,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:24,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:24,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:24,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380728927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:24,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:24,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:24,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378058850] [2021-06-05 06:51:24,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:24,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:24,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:24,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:24,504 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:24,775 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 06:51:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:51:24,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:24,777 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 06:51:24,777 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 06:51:24,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:51:24,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 06:51:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 06:51:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:24,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 06:51:24,803 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 06:51:24,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:24,803 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 06:51:24,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:24,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 06:51:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:24,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:24,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:25,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:25,006 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash -860517803, now seen corresponding path program 35 times [2021-06-05 06:51:25,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:25,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883946172] [2021-06-05 06:51:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:25,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:25,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883946172] [2021-06-05 06:51:25,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883946172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:25,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323121233] [2021-06-05 06:51:25,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:25,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:51:25,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:25,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:25,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323121233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:25,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:25,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:25,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78515441] [2021-06-05 06:51:25,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:25,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:25,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:25,133 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:25,313 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 06:51:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:51:25,313 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:25,316 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 06:51:25,316 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 06:51:25,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:51:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 06:51:25,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 06:51:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 06:51:25,331 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 06:51:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:25,331 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 06:51:25,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:25,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 06:51:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:51:25,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:25,333 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:25,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:25,534 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:25,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1270661831, now seen corresponding path program 4 times [2021-06-05 06:51:25,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:25,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277696666] [2021-06-05 06:51:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:26,067 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-05 06:51:26,328 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 06:51:26,530 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-05 06:51:26,765 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 06:51:26,914 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 06:51:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:26,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:26,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277696666] [2021-06-05 06:51:26,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277696666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:26,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90848546] [2021-06-05 06:51:26,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:26,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:26,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:26,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:51:26,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:27,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:51:27,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:51:27,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:51:27,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:51:27,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:51:27,625 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:51:27,637 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:51:27,646 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:51:27,654 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:51:27,663 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:51:27,674 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:51:27,684 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:51:27,694 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:51:27,703 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:51:27,712 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:51:27,722 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:27,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:27,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:51:27,728 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:27,810 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 06:51:27,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:51:27,812 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 06:51:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:27,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90848546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:27,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:27,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:51:27,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632085396] [2021-06-05 06:51:27,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:51:27,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:27,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:51:27,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:51:27,881 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:28,244 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-06-05 06:51:28,679 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 06:51:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:29,000 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 06:51:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:51:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:51:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:29,003 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 06:51:29,003 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 06:51:29,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2065.4ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:51:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 06:51:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 06:51:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 06:51:29,023 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 06:51:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:29,023 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 06:51:29,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 06:51:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:51:29,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:29,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:29,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:29,248 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:29,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:29,248 INFO L82 PathProgramCache]: Analyzing trace with hash -757736185, now seen corresponding path program 5 times [2021-06-05 06:51:29,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:29,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323689716] [2021-06-05 06:51:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:29,666 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 06:51:29,796 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 06:51:29,921 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 06:51:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:30,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:30,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323689716] [2021-06-05 06:51:30,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323689716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:30,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352262915] [2021-06-05 06:51:30,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:30,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:51:30,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:30,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:51:30,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:30,624 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 06:51:30,688 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_5], 3=[v_prenex_9, v_prenex_7]} [2021-06-05 06:51:30,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:30,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:30,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:30,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:51:30,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:30,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:30,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:30,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:51:30,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:30,849 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 06:51:30,853 INFO L628 ElimStorePlain]: treesize reduction 73, result has 74.2 percent of original size [2021-06-05 06:51:30,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:30,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:30,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:51:30,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:30,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:51:30,927 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 06:51:30,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 54 [2021-06-05 06:51:30,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:30,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:51:30,979 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 06:51:30,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 42 [2021-06-05 06:51:30,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:31,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:51:31,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:51:31,019 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:322, output treesize:59 [2021-06-05 06:51:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:31,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352262915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:31,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:31,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:51:31,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83540878] [2021-06-05 06:51:31,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:51:31,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:51:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:51:31,110 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:31,558 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2021-06-05 06:51:31,800 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 06:51:32,039 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-05 06:51:32,209 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 06:51:32,369 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 06:51:32,572 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-06-05 06:51:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:32,972 INFO L93 Difference]: Finished difference Result 1563 states and 5076 transitions. [2021-06-05 06:51:32,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:51:32,972 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:51:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:32,974 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 06:51:32,974 INFO L226 Difference]: Without dead ends: 1533 [2021-06-05 06:51:32,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2519.6ms TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:51:32,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-06-05 06:51:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1150. [2021-06-05 06:51:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 06:51:32,988 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 06:51:32,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:32,988 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 06:51:32,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:32,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 06:51:32,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:51:32,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:32,990 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:33,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:33,191 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:33,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:33,191 INFO L82 PathProgramCache]: Analyzing trace with hash 833693123, now seen corresponding path program 36 times [2021-06-05 06:51:33,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:33,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459475866] [2021-06-05 06:51:33,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:33,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:33,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459475866] [2021-06-05 06:51:33,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459475866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:33,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361767622] [2021-06-05 06:51:33,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:33,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:51:33,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:51:33,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:34,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:51:34,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 06:51:34,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:51:34,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 06:51:34,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 06:51:34,586 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 06:51:34,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:51:34,608 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:51:34,618 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:51:34,632 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 06:51:34,644 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:51:34,654 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 06:51:34,665 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 06:51:34,676 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:51:34,687 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 06:51:34,697 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:34,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 06:51:34,705 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,733 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-06-05 06:51:34,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,734 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-06-05 06:51:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:34,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361767622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:34,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:34,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:51:34,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193496780] [2021-06-05 06:51:34,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:51:34,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:34,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:51:34,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:51:34,768 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:35,259 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-06-05 06:51:35,498 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-06-05 06:51:36,214 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-06-05 06:51:36,381 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2021-06-05 06:51:36,576 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-06-05 06:51:36,909 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-05 06:51:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:36,990 INFO L93 Difference]: Finished difference Result 1615 states and 5216 transitions. [2021-06-05 06:51:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:51:36,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:51:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:36,993 INFO L225 Difference]: With dead ends: 1615 [2021-06-05 06:51:36,994 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 06:51:36,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2450.0ms TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:51:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 06:51:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1180. [2021-06-05 06:51:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 06:51:37,010 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 06:51:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:37,010 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 06:51:37,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 06:51:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:51:37,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:37,013 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:37,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 06:51:37,213 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:37,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1638740299, now seen corresponding path program 6 times [2021-06-05 06:51:37,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:37,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994646769] [2021-06-05 06:51:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:37,724 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 06:51:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:37,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:37,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994646769] [2021-06-05 06:51:37,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994646769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:37,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901280814] [2021-06-05 06:51:37,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:37,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:51:37,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:37,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:51:37,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:38,440 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 06:51:38,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:38,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:51:38,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:38,681 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:51:38,682 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.6 percent of original size [2021-06-05 06:51:38,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:38,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:38,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:38,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:51:38,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:38,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:38,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:51:38,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:38,813 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 06:51:38,813 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.8 percent of original size [2021-06-05 06:51:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:38,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:38,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:51:38,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:38,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:51:38,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:38,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:38,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:51:38,879 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:38,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:51:38,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:51:38,928 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 06:51:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:39,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901280814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:39,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:39,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:51:39,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323570012] [2021-06-05 06:51:39,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:51:39,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:39,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:51:39,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:51:39,024 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:39,313 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-06-05 06:51:39,867 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-05 06:51:40,022 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 06:51:40,184 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 06:51:40,486 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 06:51:40,653 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 06:51:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:40,741 INFO L93 Difference]: Finished difference Result 1620 states and 5225 transitions. [2021-06-05 06:51:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:51:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:51:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:40,744 INFO L225 Difference]: With dead ends: 1620 [2021-06-05 06:51:40,744 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 06:51:40,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2324.7ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:51:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 06:51:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1189. [2021-06-05 06:51:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-06-05 06:51:40,758 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-06-05 06:51:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:40,758 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-06-05 06:51:40,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-06-05 06:51:40,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:51:40,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:40,760 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:40,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:40,961 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1105845433, now seen corresponding path program 37 times [2021-06-05 06:51:40,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:40,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836633816] [2021-06-05 06:51:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:41,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:41,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836633816] [2021-06-05 06:51:41,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836633816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:41,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496203659] [2021-06-05 06:51:41,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:41,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:51:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 06:51:42,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 06:51:42,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 06:51:42,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 06:51:42,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:51:42,411 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:51:42,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 06:51:42,435 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 06:51:42,447 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:51:42,458 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:51:42,470 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 06:51:42,482 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:51:42,493 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 06:51:42,504 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 06:51:42,514 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:51:42,523 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:42,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:42,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:51:42,529 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:42,568 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-06-05 06:51:42,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:51:42,569 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-06-05 06:51:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:42,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496203659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:42,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:42,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:51:42,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392370505] [2021-06-05 06:51:42,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:51:42,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:51:42,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:51:42,608 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:43,127 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-06-05 06:51:43,684 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 58 [2021-06-05 06:51:43,991 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-06-05 06:51:44,767 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 06:51:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:44,895 INFO L93 Difference]: Finished difference Result 1800 states and 5747 transitions. [2021-06-05 06:51:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:51:44,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:51:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:44,898 INFO L225 Difference]: With dead ends: 1800 [2021-06-05 06:51:44,898 INFO L226 Difference]: Without dead ends: 1785 [2021-06-05 06:51:44,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2474.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:51:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-06-05 06:51:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1201. [2021-06-05 06:51:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-06-05 06:51:44,915 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-06-05 06:51:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:44,915 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-06-05 06:51:44,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-06-05 06:51:44,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:51:44,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:44,917 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:45,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 06:51:45,118 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:45,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:45,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2082164277, now seen corresponding path program 38 times [2021-06-05 06:51:45,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:45,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923368329] [2021-06-05 06:51:45,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:45,501 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 06:51:45,626 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 06:51:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:45,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:45,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923368329] [2021-06-05 06:51:45,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923368329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:45,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476826700] [2021-06-05 06:51:45,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:45,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:45,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:45,820 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:51:45,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:46,346 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-05 06:51:46,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 48 [2021-06-05 06:51:46,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:46,421 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-05 06:51:46,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 51 [2021-06-05 06:51:46,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:46,489 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 06:51:46,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 59 [2021-06-05 06:51:46,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:46,578 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-06-05 06:51:46,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 41 [2021-06-05 06:51:46,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 06:51:46,608 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 06:51:46,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:51:46,609 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:46,676 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-06-05 06:51:46,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 41 [2021-06-05 06:51:46,678 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:46,753 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 06:51:46,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 68 [2021-06-05 06:51:46,801 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:46,851 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-06-05 06:51:46,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 44 [2021-06-05 06:51:46,854 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:46,894 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-06-05 06:51:46,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 06:51:46,896 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:46,946 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-05 06:51:46,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 52 [2021-06-05 06:51:46,950 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:46,990 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 06:51:46,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 06:51:46,991 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:47,017 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 06:51:47,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 06:51:47,017 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:47,065 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-06-05 06:51:47,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 46 [2021-06-05 06:51:47,069 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:47,109 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-06-05 06:51:47,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 33 [2021-06-05 06:51:47,110 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:47,135 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 06:51:47,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:51:47,135 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:47,182 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 06:51:47,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-05 06:51:47,226 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:47,886 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 80 [2021-06-05 06:51:47,886 INFO L628 ElimStorePlain]: treesize reduction 387, result has 51.6 percent of original size [2021-06-05 06:51:47,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:51:47,907 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1105, output treesize:413 [2021-06-05 06:51:48,144 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 06:51:48,317 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 06:51:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:48,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476826700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:48,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:48,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:51:48,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918793333] [2021-06-05 06:51:48,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:51:48,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:48,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:51:48,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:51:48,426 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:48,904 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 06:51:49,507 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 06:51:49,776 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 06:51:50,203 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-05 06:51:51,012 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 64 [2021-06-05 06:51:51,175 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 06:51:51,469 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 51 [2021-06-05 06:51:51,989 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-06-05 06:51:52,473 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2021-06-05 06:51:52,847 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-06-05 06:51:53,116 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 06:51:53,680 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 118 [2021-06-05 06:51:54,405 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 106 [2021-06-05 06:51:54,939 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 117 [2021-06-05 06:51:55,496 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 95 [2021-06-05 06:51:56,258 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 105 [2021-06-05 06:51:56,458 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 06:51:56,668 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 06:51:56,880 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 06:51:57,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:57,017 INFO L93 Difference]: Finished difference Result 2410 states and 7510 transitions. [2021-06-05 06:51:57,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:51:57,017 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:51:57,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:57,020 INFO L225 Difference]: With dead ends: 2410 [2021-06-05 06:51:57,020 INFO L226 Difference]: Without dead ends: 2365 [2021-06-05 06:51:57,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 8823.2ms TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:51:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-06-05 06:51:57,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1341. [2021-06-05 06:51:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3007462686567166) internal successors, (4423), 1340 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4423 transitions. [2021-06-05 06:51:57,041 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4423 transitions. Word has length 26 [2021-06-05 06:51:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:57,041 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4423 transitions. [2021-06-05 06:51:57,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4423 transitions. [2021-06-05 06:51:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:51:57,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:57,043 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:57,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:57,243 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash 127735791, now seen corresponding path program 7 times [2021-06-05 06:51:57,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:57,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936497223] [2021-06-05 06:51:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:57,710 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-05 06:51:57,924 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 06:51:58,133 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 06:51:58,317 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 06:51:58,451 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 06:51:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:58,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:58,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936497223] [2021-06-05 06:51:58,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936497223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:58,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50184114] [2021-06-05 06:51:58,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:51:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:59,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:51:59,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:51:59,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:51:59,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:51:59,090 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:51:59,098 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:51:59,106 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:51:59,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:51:59,122 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:51:59,129 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:51:59,137 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:51:59,145 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:51:59,155 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:51:59,163 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:51:59,170 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:51:59,178 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:51:59,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:59,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:51:59,183 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:59,264 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-06-05 06:51:59,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:51:59,266 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 06:51:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:59,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50184114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:59,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:59,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:51:59,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663604687] [2021-06-05 06:51:59,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:51:59,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:59,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:51:59,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:51:59,328 INFO L87 Difference]: Start difference. First operand 1341 states and 4423 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,070 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-06-05 06:52:00,335 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 06:52:00,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:00,673 INFO L93 Difference]: Finished difference Result 1736 states and 5612 transitions. [2021-06-05 06:52:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:52:00,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:00,677 INFO L225 Difference]: With dead ends: 1736 [2021-06-05 06:52:00,677 INFO L226 Difference]: Without dead ends: 1721 [2021-06-05 06:52:00,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2222.7ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:52:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-06-05 06:52:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1352. [2021-06-05 06:52:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.298297557364915) internal successors, (4456), 1351 states have internal predecessors, (4456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4456 transitions. [2021-06-05 06:52:00,698 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4456 transitions. Word has length 26 [2021-06-05 06:52:00,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:00,699 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4456 transitions. [2021-06-05 06:52:00,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4456 transitions. [2021-06-05 06:52:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:00,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:00,702 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:00,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 06:52:00,917 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:00,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1900662225, now seen corresponding path program 8 times [2021-06-05 06:52:00,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:00,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263804035] [2021-06-05 06:52:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:01,170 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-05 06:52:01,335 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 06:52:01,482 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 06:52:01,615 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 06:52:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:01,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263804035] [2021-06-05 06:52:01,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263804035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582714328] [2021-06-05 06:52:01,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:01,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:01,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:01,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:52:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:02,143 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 06:52:02,263 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:02,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-06-05 06:52:02,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:02,454 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-06-05 06:52:02,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:02,483 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:52:02,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 75 [2021-06-05 06:52:02,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:02,655 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-05 06:52:02,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:02,679 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:02,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 71 [2021-06-05 06:52:02,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:02,845 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 06:52:02,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:02,865 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:52:02,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 49 [2021-06-05 06:52:02,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:03,035 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 06:52:03,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:03,065 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:03,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 06:52:03,067 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:03,239 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 06:52:03,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:03,262 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:52:03,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 57 [2021-06-05 06:52:03,266 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:03,573 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 127 [2021-06-05 06:52:03,574 INFO L628 ElimStorePlain]: treesize reduction 16, result has 96.2 percent of original size [2021-06-05 06:52:03,594 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:03,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 06:52:03,597 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:03,882 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-05 06:52:03,883 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-06-05 06:52:03,904 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:03,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-06-05 06:52:03,906 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,045 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 06:52:04,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:04,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:52:04,068 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:743, output treesize:480 [2021-06-05 06:52:04,336 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 06:52:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:04,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582714328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:04,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:04,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:52:04,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112885079] [2021-06-05 06:52:04,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:52:04,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:04,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:52:04,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:52:04,538 INFO L87 Difference]: Start difference. First operand 1352 states and 4456 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:05,319 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 06:52:05,789 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-05 06:52:05,954 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 06:52:06,161 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2021-06-05 06:52:06,532 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2021-06-05 06:52:06,713 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-05 06:52:06,921 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-06-05 06:52:07,072 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 06:52:07,370 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 06:52:07,569 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 06:52:07,867 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-05 06:52:08,378 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-06-05 06:52:08,837 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2021-06-05 06:52:09,296 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-06-05 06:52:09,826 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-05 06:52:10,129 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 06:52:10,389 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-05 06:52:10,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:10,471 INFO L93 Difference]: Finished difference Result 2040 states and 6414 transitions. [2021-06-05 06:52:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:52:10,471 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:10,474 INFO L225 Difference]: With dead ends: 2040 [2021-06-05 06:52:10,474 INFO L226 Difference]: Without dead ends: 2025 [2021-06-05 06:52:10,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 6551.4ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:52:10,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-06-05 06:52:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1363. [2021-06-05 06:52:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.3069016152716593) internal successors, (4504), 1362 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4504 transitions. [2021-06-05 06:52:10,494 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4504 transitions. Word has length 26 [2021-06-05 06:52:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:10,494 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4504 transitions. [2021-06-05 06:52:10,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:10,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4504 transitions. [2021-06-05 06:52:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:10,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:10,496 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:10,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 06:52:10,696 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:10,697 INFO L82 PathProgramCache]: Analyzing trace with hash 456895363, now seen corresponding path program 9 times [2021-06-05 06:52:10,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:10,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777277418] [2021-06-05 06:52:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:11,038 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-05 06:52:11,162 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-06-05 06:52:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:11,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:11,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777277418] [2021-06-05 06:52:11,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777277418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:11,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971797371] [2021-06-05 06:52:11,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:11,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:52:11,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:11,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:52:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:12,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:12,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:12,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:12,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:12,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:12,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:12,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:52:12,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:12,492 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 06:52:12,492 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-06-05 06:52:12,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:12,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:12,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:52:12,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:12,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:12,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:12,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:12,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:52:12,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:12,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:12,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:12,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:12,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:12,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:12,652 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:12,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:12,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:52:12,658 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:12,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:12,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:52:12,718 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-06-05 06:52:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:12,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971797371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:12,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:12,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:52:12,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780270176] [2021-06-05 06:52:12,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:52:12,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:12,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:52:12,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:52:12,798 INFO L87 Difference]: Start difference. First operand 1363 states and 4504 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:13,028 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-06-05 06:52:13,725 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-06-05 06:52:13,935 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-05 06:52:14,247 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 62 [2021-06-05 06:52:14,649 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-06-05 06:52:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:14,807 INFO L93 Difference]: Finished difference Result 1593 states and 5152 transitions. [2021-06-05 06:52:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:52:14,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:14,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:14,809 INFO L225 Difference]: With dead ends: 1593 [2021-06-05 06:52:14,809 INFO L226 Difference]: Without dead ends: 1578 [2021-06-05 06:52:14,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2578.1ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:52:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-06-05 06:52:14,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1372. [2021-06-05 06:52:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-06-05 06:52:14,824 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-06-05 06:52:14,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:14,824 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-06-05 06:52:14,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-06-05 06:52:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:14,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:14,826 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:15,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:15,027 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash 289086271, now seen corresponding path program 10 times [2021-06-05 06:52:15,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:15,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475538591] [2021-06-05 06:52:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:15,384 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2021-06-05 06:52:15,551 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 06:52:15,705 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 06:52:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:15,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:15,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475538591] [2021-06-05 06:52:15,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475538591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:15,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495377402] [2021-06-05 06:52:15,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:15,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:15,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:52:15,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:16,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:52:16,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:52:16,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:52:16,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:52:16,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:16,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:52:16,483 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:52:16,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:52:16,502 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:52:16,518 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:52:16,527 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:52:16,534 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:16,541 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:52:16,548 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:52:16,554 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:52:16,560 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:16,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:16,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:52:16,566 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:16,632 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 06:52:16,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:52:16,633 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 06:52:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:16,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495377402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:16,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:16,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:52:16,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628287016] [2021-06-05 06:52:16,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:52:16,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:16,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:52:16,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:52:16,686 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:17,108 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-05 06:52:17,381 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-05 06:52:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:17,641 INFO L93 Difference]: Finished difference Result 1674 states and 5467 transitions. [2021-06-05 06:52:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:52:17,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:17,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:17,643 INFO L225 Difference]: With dead ends: 1674 [2021-06-05 06:52:17,643 INFO L226 Difference]: Without dead ends: 1659 [2021-06-05 06:52:17,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1623.4ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:52:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-06-05 06:52:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1372. [2021-06-05 06:52:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-06-05 06:52:17,659 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-06-05 06:52:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:17,659 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-06-05 06:52:17,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:17,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-06-05 06:52:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:17,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:17,662 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:17,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 06:52:17,862 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:17,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1778429757, now seen corresponding path program 11 times [2021-06-05 06:52:17,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:17,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287247649] [2021-06-05 06:52:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:18,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:18,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287247649] [2021-06-05 06:52:18,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287247649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:18,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822073705] [2021-06-05 06:52:18,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:18,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:52:18,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:52:18,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:19,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:19,180 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:52:19,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 29 [2021-06-05 06:52:19,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:19,202 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:52:19,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:52:19,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:19,395 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 06:52:19,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:19,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:19,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:19,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 06:52:19,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:19,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:19,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:19,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:52:19,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:19,619 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 06:52:19,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:19,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:19,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:19,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 06:52:19,643 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:19,663 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:52:19,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:52:19,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:19,847 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:52:19,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:19,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:19,868 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:52:19,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:52:19,870 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:19,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:19,890 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:52:19,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 06:52:19,892 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:20,049 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 06:52:20,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:20,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:52:20,077 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:401, output treesize:389 [2021-06-05 06:52:20,289 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 06:52:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:20,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822073705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:20,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:20,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:52:20,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049648599] [2021-06-05 06:52:20,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:52:20,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:52:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:52:20,388 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:20,845 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-06-05 06:52:21,006 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 48 [2021-06-05 06:52:21,348 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 06:52:21,639 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 06:52:21,978 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-06-05 06:52:22,354 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2021-06-05 06:52:22,500 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 06:52:22,868 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2021-06-05 06:52:23,068 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-05 06:52:23,419 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2021-06-05 06:52:23,909 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2021-06-05 06:52:24,204 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-06-05 06:52:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:24,312 INFO L93 Difference]: Finished difference Result 2311 states and 7396 transitions. [2021-06-05 06:52:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:52:24,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:24,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:24,315 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 06:52:24,315 INFO L226 Difference]: Without dead ends: 2281 [2021-06-05 06:52:24,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4320.1ms TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:52:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-06-05 06:52:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1375. [2021-06-05 06:52:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.3151382823871907) internal successors, (4555), 1374 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4555 transitions. [2021-06-05 06:52:24,336 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4555 transitions. Word has length 26 [2021-06-05 06:52:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:24,336 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4555 transitions. [2021-06-05 06:52:24,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:24,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4555 transitions. [2021-06-05 06:52:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:24,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:24,338 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:24,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:24,539 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:24,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:24,539 INFO L82 PathProgramCache]: Analyzing trace with hash -746246473, now seen corresponding path program 12 times [2021-06-05 06:52:24,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:24,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369996371] [2021-06-05 06:52:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:24,849 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2021-06-05 06:52:25,042 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 06:52:25,217 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-06-05 06:52:25,394 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-06-05 06:52:25,547 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 06:52:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:25,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:25,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369996371] [2021-06-05 06:52:25,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369996371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:25,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416112742] [2021-06-05 06:52:25,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:25,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:52:25,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:25,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:52:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,908 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:25,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 06:52:25,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:25,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,924 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:52:25,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-06-05 06:52:25,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:25,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:25,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-06-05 06:52:25,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:25,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,955 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-06-05 06:52:25,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:25,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,968 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:25,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:52:25,968 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:25,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,980 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:25,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 06:52:25,981 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:25,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:25,994 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:25,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 06:52:25,995 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:25,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:25,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,009 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:52:26,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:52:26,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:26,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,024 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:26,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:52:26,025 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:26,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,039 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:26,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 06:52:26,040 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:26,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,056 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:26,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 06:52:26,057 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:26,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,069 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:26,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:52:26,074 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:26,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:26,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-06-05 06:52:26,090 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:26,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,104 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:52:26,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2021-06-05 06:52:26,105 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:26,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,116 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:26,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:52:26,117 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:26,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:26,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:26,124 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:26,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:52:26,125 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:26,197 INFO L628 ElimStorePlain]: treesize reduction 49, result has 63.7 percent of original size [2021-06-05 06:52:26,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:52:26,198 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-06-05 06:52:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:26,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416112742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:26,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:26,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:52:26,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338257549] [2021-06-05 06:52:26,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:52:26,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:26,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:52:26,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:52:26,327 INFO L87 Difference]: Start difference. First operand 1375 states and 4555 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:27,042 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-06-05 06:52:27,313 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-06-05 06:52:27,532 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-05 06:52:27,663 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 06:52:27,851 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2021-06-05 06:52:28,105 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 06:52:28,284 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 06:52:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:28,874 INFO L93 Difference]: Finished difference Result 1790 states and 5831 transitions. [2021-06-05 06:52:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:52:28,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:28,877 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 06:52:28,877 INFO L226 Difference]: Without dead ends: 1775 [2021-06-05 06:52:28,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3151.0ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:52:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-05 06:52:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1378. [2021-06-05 06:52:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.316630355846042) internal successors, (4567), 1377 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4567 transitions. [2021-06-05 06:52:28,895 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4567 transitions. Word has length 26 [2021-06-05 06:52:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:28,895 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4567 transitions. [2021-06-05 06:52:28,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4567 transitions. [2021-06-05 06:52:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:28,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:28,898 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:29,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 06:52:29,113 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:29,113 INFO L82 PathProgramCache]: Analyzing trace with hash 148423883, now seen corresponding path program 13 times [2021-06-05 06:52:29,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:29,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768313833] [2021-06-05 06:52:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:29,363 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-06-05 06:52:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:29,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:29,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768313833] [2021-06-05 06:52:29,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768313833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:29,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058671990] [2021-06-05 06:52:29,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:52:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:30,213 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 06:52:30,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:30,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:30,300 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 06:52:30,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 06:52:30,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:30,326 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:52:30,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 57 [2021-06-05 06:52:30,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:30,509 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-06-05 06:52:30,509 INFO L628 ElimStorePlain]: treesize reduction 211, result has 55.7 percent of original size [2021-06-05 06:52:30,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:30,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 06:52:30,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:30,535 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:52:30,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 50 [2021-06-05 06:52:30,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:30,654 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 06:52:30,655 INFO L628 ElimStorePlain]: treesize reduction 19, result has 90.4 percent of original size [2021-06-05 06:52:30,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:30,681 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:52:30,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 30 [2021-06-05 06:52:30,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:30,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:30,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:30,742 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:52:30,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 53 [2021-06-05 06:52:30,744 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:30,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:30,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:52:30,782 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:619, output treesize:64 [2021-06-05 06:52:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:30,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058671990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:30,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:30,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:52:30,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254336305] [2021-06-05 06:52:30,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:52:30,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:52:30,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:52:30,855 INFO L87 Difference]: Start difference. First operand 1378 states and 4567 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:31,171 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-05 06:52:31,508 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 06:52:31,672 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-06-05 06:52:32,161 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-06-05 06:52:32,395 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 06:52:32,691 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 06:52:32,906 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 06:52:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:33,071 INFO L93 Difference]: Finished difference Result 2164 states and 6833 transitions. [2021-06-05 06:52:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:52:33,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:33,074 INFO L225 Difference]: With dead ends: 2164 [2021-06-05 06:52:33,074 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 06:52:33,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2531.5ms TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:52:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 06:52:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1380. [2021-06-05 06:52:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-05 06:52:33,093 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-05 06:52:33,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:33,093 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-05 06:52:33,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:33,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-05 06:52:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:33,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:33,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:33,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-05 06:52:33,296 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:33,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash -806418041, now seen corresponding path program 39 times [2021-06-05 06:52:33,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:33,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614934072] [2021-06-05 06:52:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:33,627 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 06:52:33,797 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-05 06:52:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:34,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:34,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614934072] [2021-06-05 06:52:34,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614934072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:34,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89636749] [2021-06-05 06:52:34,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:34,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:52:34,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:34,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:52:34,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2021-06-05 06:52:34,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-06-05 06:52:34,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2021-06-05 06:52:34,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 24 [2021-06-05 06:52:34,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-06-05 06:52:34,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 18 [2021-06-05 06:52:34,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:52:34,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 12 [2021-06-05 06:52:34,599 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2021-06-05 06:52:34,614 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-06-05 06:52:34,627 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 28 [2021-06-05 06:52:34,640 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 24 [2021-06-05 06:52:34,653 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 14 [2021-06-05 06:52:34,666 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 24 [2021-06-05 06:52:34,678 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2021-06-05 06:52:34,689 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:34,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:34,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 28 [2021-06-05 06:52:34,699 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:34,780 INFO L628 ElimStorePlain]: treesize reduction 50, result has 49.5 percent of original size [2021-06-05 06:52:34,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:52:34,781 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1097, output treesize:49 [2021-06-05 06:52:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:34,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89636749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:34,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:34,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 06:52:34,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665826728] [2021-06-05 06:52:34,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:52:34,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:52:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:52:34,898 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:35,375 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-06-05 06:52:35,799 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2021-06-05 06:52:36,282 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-06-05 06:52:36,977 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-06-05 06:52:38,123 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-05 06:52:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:38,540 INFO L93 Difference]: Finished difference Result 3078 states and 9474 transitions. [2021-06-05 06:52:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:52:38,540 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:38,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:38,544 INFO L225 Difference]: With dead ends: 3078 [2021-06-05 06:52:38,544 INFO L226 Difference]: Without dead ends: 2991 [2021-06-05 06:52:38,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3819.9ms TimeCoverageRelationStatistics Valid=542, Invalid=2764, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:52:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-05 06:52:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1413. [2021-06-05 06:52:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3208215297450425) internal successors, (4689), 1412 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4689 transitions. [2021-06-05 06:52:38,567 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4689 transitions. Word has length 26 [2021-06-05 06:52:38,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:38,567 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4689 transitions. [2021-06-05 06:52:38,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4689 transitions. [2021-06-05 06:52:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:38,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:38,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:38,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 06:52:38,771 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:38,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:38,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1738294259, now seen corresponding path program 14 times [2021-06-05 06:52:38,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:38,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64193935] [2021-06-05 06:52:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:38,996 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-06-05 06:52:39,202 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 06:52:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:39,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:39,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64193935] [2021-06-05 06:52:39,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64193935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:39,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303545400] [2021-06-05 06:52:39,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:39,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:39,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:39,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:52:39,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:39,852 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 06:52:40,214 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2021-06-05 06:52:40,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:40,551 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 06:52:40,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 89 [2021-06-05 06:52:40,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:40,577 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-06-05 06:52:40,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 1 [2021-06-05 06:52:40,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:41,144 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 197 [2021-06-05 06:52:41,145 INFO L628 ElimStorePlain]: treesize reduction 788, result has 46.3 percent of original size [2021-06-05 06:52:41,171 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:41,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 52 [2021-06-05 06:52:41,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:41,341 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-06-05 06:52:41,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:41,374 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:52:41,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 69 [2021-06-05 06:52:41,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:41,548 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 06:52:41,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:41,572 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:41,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 62 [2021-06-05 06:52:41,574 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:41,750 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 06:52:41,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:41,771 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:52:41,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 55 [2021-06-05 06:52:41,772 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:41,955 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 06:52:41,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:41,980 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:52:41,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 60 [2021-06-05 06:52:41,984 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:42,149 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 06:52:42,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:42,179 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:52:42,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 72 [2021-06-05 06:52:42,181 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:42,341 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:52:42,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:42,371 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:52:42,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 77 [2021-06-05 06:52:42,373 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:42,526 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 06:52:42,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:42,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:52:42,551 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1661, output treesize:498 [2021-06-05 06:52:42,803 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 06:52:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:42,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303545400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:42,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:42,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:52:42,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275464885] [2021-06-05 06:52:42,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:52:42,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:42,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:52:42,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:52:42,909 INFO L87 Difference]: Start difference. First operand 1413 states and 4689 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:43,548 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:52:43,745 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 06:52:43,914 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-05 06:52:44,227 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-05 06:52:44,498 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-05 06:52:44,686 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2021-06-05 06:52:44,927 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-05 06:52:45,302 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 76 [2021-06-05 06:52:46,026 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-05 06:52:47,905 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 277 DAG size of output: 259 [2021-06-05 06:52:48,622 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 113 [2021-06-05 06:52:49,197 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-06-05 06:52:49,907 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 112 [2021-06-05 06:52:51,980 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 274 DAG size of output: 258 [2021-06-05 06:52:54,220 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 303 DAG size of output: 279 [2021-06-05 06:52:54,855 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-06-05 06:52:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:55,359 INFO L93 Difference]: Finished difference Result 2106 states and 6748 transitions. [2021-06-05 06:52:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:52:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:55,362 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 06:52:55,362 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 06:52:55,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 12075.2ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:52:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 06:52:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1409. [2021-06-05 06:52:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-06-05 06:52:55,381 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-06-05 06:52:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:55,381 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-06-05 06:52:55,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-06-05 06:52:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:55,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:55,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:55,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:55,584 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash 120761479, now seen corresponding path program 15 times [2021-06-05 06:52:55,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:55,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302330256] [2021-06-05 06:52:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:56,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:56,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302330256] [2021-06-05 06:52:56,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302330256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:56,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704214811] [2021-06-05 06:52:56,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:56,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:52:56,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:56,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:52:56,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:56,647 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 06:52:56,730 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_80, v_prenex_87, v_prenex_85, v_prenex_78], 6=[v_prenex_83, A, v_prenex_76, v_prenex_89]} [2021-06-05 06:52:56,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:56,756 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:52:56,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:52:56,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,131 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 153 [2021-06-05 06:52:57,132 INFO L628 ElimStorePlain]: treesize reduction 413, result has 53.5 percent of original size [2021-06-05 06:52:57,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:57,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:52:57,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,313 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 06:52:57,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:57,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:57,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:52:57,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,471 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 06:52:57,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:57,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:57,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:52:57,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,625 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 06:52:57,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:57,642 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:52:57,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-06-05 06:52:57,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,778 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 06:52:57,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:57,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,800 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 06:52:57,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 06:52:57,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,926 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 06:52:57,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:57,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,947 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:52:57,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-06-05 06:52:57,948 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:58,065 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 06:52:58,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:58,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:58,078 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:52:58,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2021-06-05 06:52:58,079 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:58,190 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 06:52:58,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:58,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:52:58,199 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:903, output treesize:216 [2021-06-05 06:52:58,347 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-05 06:52:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:58,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704214811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:58,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:58,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:52:58,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821038340] [2021-06-05 06:52:58,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:52:58,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:58,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:52:58,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:52:58,451 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:58,870 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 06:52:59,145 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 06:52:59,294 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-05 06:52:59,429 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-06-05 06:52:59,581 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 06:53:00,196 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2021-06-05 06:53:00,538 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 06:53:00,726 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-06-05 06:53:01,473 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2021-06-05 06:53:01,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:01,910 INFO L93 Difference]: Finished difference Result 2320 states and 7312 transitions. [2021-06-05 06:53:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:53:01,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:01,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:01,914 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 06:53:01,914 INFO L226 Difference]: Without dead ends: 2305 [2021-06-05 06:53:01,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3715.1ms TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:53:01,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-05 06:53:01,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1409. [2021-06-05 06:53:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-06-05 06:53:01,934 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-06-05 06:53:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:01,934 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-06-05 06:53:01,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:01,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-06-05 06:53:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:01,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:01,936 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:02,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 06:53:02,136 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash 395894327, now seen corresponding path program 40 times [2021-06-05 06:53:02,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:02,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5780596] [2021-06-05 06:53:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:02,452 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-06-05 06:53:02,584 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 06:53:02,722 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-06-05 06:53:02,840 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-06-05 06:53:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:02,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:02,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5780596] [2021-06-05 06:53:02,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5780596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:02,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409327589] [2021-06-05 06:53:02,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:03,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:03,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:03,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 06:53:03,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 06:53:03,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:53:03,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 06:53:03,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 06:53:03,732 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 06:53:03,745 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:53:03,760 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 06:53:03,771 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 06:53:03,781 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 06:53:03,792 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 06:53:03,802 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 06:53:03,812 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:53:03,821 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 06:53:03,831 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:53:03,840 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:03,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:03,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 06:53:03,846 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:03,929 INFO L628 ElimStorePlain]: treesize reduction 347, result has 11.5 percent of original size [2021-06-05 06:53:03,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:53:03,930 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:39 [2021-06-05 06:53:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:03,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409327589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:03,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:03,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 06:53:03,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364063433] [2021-06-05 06:53:03,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:03,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:03,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:03,975 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:04,399 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 06:53:04,621 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 06:53:05,028 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-05 06:53:05,229 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-05 06:53:05,816 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-05 06:53:06,004 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-06-05 06:53:06,423 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-06-05 06:53:06,787 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-06-05 06:53:07,285 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 06:53:07,453 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-06-05 06:53:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:07,833 INFO L93 Difference]: Finished difference Result 2743 states and 8648 transitions. [2021-06-05 06:53:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:53:07,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:07,837 INFO L225 Difference]: With dead ends: 2743 [2021-06-05 06:53:07,837 INFO L226 Difference]: Without dead ends: 2698 [2021-06-05 06:53:07,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 4061.7ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:53:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-06-05 06:53:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 1412. [2021-06-05 06:53:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.3217576187101345) internal successors, (4687), 1411 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4687 transitions. [2021-06-05 06:53:07,857 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4687 transitions. Word has length 26 [2021-06-05 06:53:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:07,857 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4687 transitions. [2021-06-05 06:53:07,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4687 transitions. [2021-06-05 06:53:07,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:07,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:07,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:08,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:08,060 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:08,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:08,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2065424317, now seen corresponding path program 41 times [2021-06-05 06:53:08,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:08,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891580943] [2021-06-05 06:53:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:08,446 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-05 06:53:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:08,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:08,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891580943] [2021-06-05 06:53:08,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891580943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:08,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343093172] [2021-06-05 06:53:08,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:08,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:53:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:08,691 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:53:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:09,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,323 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:53:09,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 44 [2021-06-05 06:53:09,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,354 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:53:09,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 06:53:09,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,394 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:53:09,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-06-05 06:53:09,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,430 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:53:09,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-06-05 06:53:09,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,477 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:53:09,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2021-06-05 06:53:09,481 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,508 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 06:53:09,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 38 [2021-06-05 06:53:09,510 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,526 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:09,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:53:09,527 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,545 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:09,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:53:09,545 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,567 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:09,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:53:09,567 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,602 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:53:09,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 06:53:09,605 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,622 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:09,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 06:53:09,622 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,639 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:09,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:53:09,640 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,666 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 06:53:09,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-06-05 06:53:09,668 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,685 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:09,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 06:53:09,686 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,704 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:09,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 1 [2021-06-05 06:53:09,705 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:09,716 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:09,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:53:09,717 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:09,854 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-06-05 06:53:09,854 INFO L628 ElimStorePlain]: treesize reduction 202, result has 36.7 percent of original size [2021-06-05 06:53:09,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:53:09,856 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:103 [2021-06-05 06:53:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:10,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343093172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:10,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:10,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 06:53:10,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762651087] [2021-06-05 06:53:10,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:53:10,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:10,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:53:10,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:10,021 INFO L87 Difference]: Start difference. First operand 1412 states and 4687 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:10,433 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 06:53:10,733 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 06:53:10,978 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 06:53:11,286 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 06:53:11,673 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2021-06-05 06:53:12,111 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-05 06:53:12,354 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 06:53:12,619 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-05 06:53:12,880 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 06:53:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:13,160 INFO L93 Difference]: Finished difference Result 2483 states and 7959 transitions. [2021-06-05 06:53:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:53:13,160 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:13,164 INFO L225 Difference]: With dead ends: 2483 [2021-06-05 06:53:13,164 INFO L226 Difference]: Without dead ends: 2453 [2021-06-05 06:53:13,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 3305.6ms TimeCoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:53:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-06-05 06:53:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1413. [2021-06-05 06:53:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3236543909348444) internal successors, (4693), 1412 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4693 transitions. [2021-06-05 06:53:13,193 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4693 transitions. Word has length 26 [2021-06-05 06:53:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:13,193 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4693 transitions. [2021-06-05 06:53:13,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4693 transitions. [2021-06-05 06:53:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:13,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:13,196 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:13,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-06-05 06:53:13,413 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:13,413 INFO L82 PathProgramCache]: Analyzing trace with hash 386531115, now seen corresponding path program 16 times [2021-06-05 06:53:13,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:13,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35346622] [2021-06-05 06:53:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:13,684 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 06:53:13,868 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-06-05 06:53:14,000 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 06:53:14,131 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 06:53:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:14,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:14,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35346622] [2021-06-05 06:53:14,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35346622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:14,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080086020] [2021-06-05 06:53:14,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:14,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:14,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:14,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:14,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:14,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:53:14,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:53:14,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:14,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:14,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:14,747 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:53:14,755 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:14,763 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:14,771 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:14,779 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:14,786 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:14,794 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:53:14,801 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:53:14,810 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:14,820 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:14,827 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:14,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:14,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:53:14,831 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:14,900 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.2 percent of original size [2021-06-05 06:53:14,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:53:14,901 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-06-05 06:53:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:14,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080086020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:14,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:14,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:14,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880096146] [2021-06-05 06:53:14,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:14,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:14,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:14,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:14,948 INFO L87 Difference]: Start difference. First operand 1413 states and 4693 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:15,538 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 06:53:15,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:15,910 INFO L93 Difference]: Finished difference Result 1799 states and 5861 transitions. [2021-06-05 06:53:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:53:15,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:15,912 INFO L225 Difference]: With dead ends: 1799 [2021-06-05 06:53:15,912 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 06:53:15,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1601.8ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:53:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 06:53:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1422. [2021-06-05 06:53:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-06-05 06:53:15,931 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-06-05 06:53:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:15,931 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-06-05 06:53:15,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:15,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-06-05 06:53:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:15,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:15,933 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:16,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-06-05 06:53:16,133 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:16,134 INFO L82 PathProgramCache]: Analyzing trace with hash 715690687, now seen corresponding path program 17 times [2021-06-05 06:53:16,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:16,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181275886] [2021-06-05 06:53:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:16,545 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 06:53:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:16,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:16,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181275886] [2021-06-05 06:53:16,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181275886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:16,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364616979] [2021-06-05 06:53:16,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:16,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:53:16,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:16,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:53:16,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:17,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:17,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:17,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:53:17,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:53:17,262 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:53:17,268 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:17,274 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:17,280 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:53:17,288 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:17,303 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:17,310 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:17,316 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:53:17,322 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:17,327 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:53:17,333 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:17,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:17,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:17,337 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:17,404 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-06-05 06:53:17,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:53:17,406 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 06:53:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:17,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364616979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:17,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:17,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:53:17,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282912919] [2021-06-05 06:53:17,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:53:17,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:17,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:53:17,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:17,455 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:17,891 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-06-05 06:53:18,050 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-06-05 06:53:18,355 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 06:53:18,536 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-05 06:53:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:19,038 INFO L93 Difference]: Finished difference Result 1615 states and 5256 transitions. [2021-06-05 06:53:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:53:19,039 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:19,041 INFO L225 Difference]: With dead ends: 1615 [2021-06-05 06:53:19,041 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 06:53:19,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2014.0ms TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:53:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 06:53:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1431. [2021-06-05 06:53:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 3.327972027972028) internal successors, (4759), 1430 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4759 transitions. [2021-06-05 06:53:19,061 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4759 transitions. Word has length 26 [2021-06-05 06:53:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:19,061 INFO L482 AbstractCegarLoop]: Abstraction has 1431 states and 4759 transitions. [2021-06-05 06:53:19,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4759 transitions. [2021-06-05 06:53:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:19,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:19,063 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:19,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable918 [2021-06-05 06:53:19,263 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash 547881595, now seen corresponding path program 18 times [2021-06-05 06:53:19,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:19,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117354217] [2021-06-05 06:53:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:19,585 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-06-05 06:53:19,799 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 57 [2021-06-05 06:53:20,039 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-06-05 06:53:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:20,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:20,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117354217] [2021-06-05 06:53:20,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117354217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:20,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989746800] [2021-06-05 06:53:20,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:20,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:53:20,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:20,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:53:20,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:20,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:20,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:53:20,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,649 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:20,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:20,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:53:20,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,674 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:53:20,675 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,684 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:20,684 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,696 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:53:20,697 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,706 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:20,707 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,717 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:20,718 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,730 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:53:20,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 06:53:20,732 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,741 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:20,742 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,752 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:53:20,753 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,763 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:20,764 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,773 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:53:20,775 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,789 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:53:20,790 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:20,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:53:20,805 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:20,813 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:20,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:53:20,813 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:20,904 INFO L628 ElimStorePlain]: treesize reduction 55, result has 61.8 percent of original size [2021-06-05 06:53:20,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:53:20,908 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:88 [2021-06-05 06:53:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:21,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989746800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:21,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:21,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:53:21,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325418440] [2021-06-05 06:53:21,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:21,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:21,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:21,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:21,059 INFO L87 Difference]: Start difference. First operand 1431 states and 4759 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:21,752 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2021-06-05 06:53:21,888 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 06:53:22,230 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 06:53:22,447 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 06:53:22,818 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 06:53:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:22,889 INFO L93 Difference]: Finished difference Result 1909 states and 6216 transitions. [2021-06-05 06:53:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:53:22,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:22,892 INFO L225 Difference]: With dead ends: 1909 [2021-06-05 06:53:22,892 INFO L226 Difference]: Without dead ends: 1894 [2021-06-05 06:53:22,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2416.8ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:53:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-05 06:53:22,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1422. [2021-06-05 06:53:22,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-06-05 06:53:22,909 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-06-05 06:53:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:22,909 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-06-05 06:53:22,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:22,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-06-05 06:53:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:22,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:22,911 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:23,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:23,112 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:23,112 INFO L82 PathProgramCache]: Analyzing trace with hash -2104983929, now seen corresponding path program 19 times [2021-06-05 06:53:23,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:23,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096943556] [2021-06-05 06:53:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:23,385 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-06-05 06:53:23,511 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-06-05 06:53:23,641 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-05 06:53:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:23,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:23,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096943556] [2021-06-05 06:53:23,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096943556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:23,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049416104] [2021-06-05 06:53:23,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:23,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:23,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:24,252 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 06:53:24,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:24,318 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:53:24,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:53:24,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:24,456 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 06:53:24,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:24,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:24,470 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:53:24,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 06:53:24,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:24,605 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:53:24,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:24,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:24,620 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:53:24,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:53:24,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:24,751 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 06:53:24,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:24,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:24,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:24,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:53:24,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:24,887 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 06:53:24,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:24,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:24,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:24,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:53:24,901 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:25,021 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 06:53:25,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:25,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:25,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:25,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:53:25,035 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:25,153 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 06:53:25,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:25,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:25,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:25,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:53:25,167 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:25,282 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 06:53:25,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:25,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:25,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:53:25,297 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:25,410 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:53:25,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:25,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:53:25,418 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 06:53:25,590 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 06:53:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:25,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049416104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:25,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:25,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:25,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328839499] [2021-06-05 06:53:25,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:25,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:25,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:25,674 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:26,462 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 06:53:26,724 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-06-05 06:53:26,983 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 06:53:27,489 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-06-05 06:53:27,919 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-06-05 06:53:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:28,157 INFO L93 Difference]: Finished difference Result 2073 states and 6674 transitions. [2021-06-05 06:53:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:53:28,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:28,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:28,160 INFO L225 Difference]: With dead ends: 2073 [2021-06-05 06:53:28,160 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 06:53:28,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3172.2ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:53:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 06:53:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1419. [2021-06-05 06:53:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3222849083215795) internal successors, (4711), 1418 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4711 transitions. [2021-06-05 06:53:28,187 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4711 transitions. Word has length 26 [2021-06-05 06:53:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:28,187 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4711 transitions. [2021-06-05 06:53:28,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4711 transitions. [2021-06-05 06:53:28,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:28,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:28,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:28,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable986 [2021-06-05 06:53:28,412 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:28,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:28,412 INFO L82 PathProgramCache]: Analyzing trace with hash 178197831, now seen corresponding path program 20 times [2021-06-05 06:53:28,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:28,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827249436] [2021-06-05 06:53:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:28,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:28,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827249436] [2021-06-05 06:53:28,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827249436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:28,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110732166] [2021-06-05 06:53:28,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:28,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:28,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:28,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:28,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:29,246 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:29,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:29,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,267 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:29,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:53:29,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,291 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:29,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 06:53:29,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,302 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:29,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:29,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,323 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:29,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 06:53:29,324 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,334 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:29,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:29,335 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,344 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:29,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:29,345 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,358 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:53:29,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 16 [2021-06-05 06:53:29,359 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:29,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:53:29,376 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,386 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:29,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:53:29,387 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,396 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:29,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:53:29,397 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,406 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:29,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:29,407 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,425 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:53:29,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 06:53:29,426 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,436 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:29,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:29,436 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,447 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:29,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:53:29,447 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,455 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:29,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:53:29,455 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:29,577 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-05 06:53:29,578 INFO L628 ElimStorePlain]: treesize reduction 63, result has 68.8 percent of original size [2021-06-05 06:53:29,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:53:29,599 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:157 [2021-06-05 06:53:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:29,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110732166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:29,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:29,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:53:29,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784279898] [2021-06-05 06:53:29,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:53:29,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:53:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:29,751 INFO L87 Difference]: Start difference. First operand 1419 states and 4711 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:31,068 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 06:53:31,490 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 06:53:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:32,080 INFO L93 Difference]: Finished difference Result 1996 states and 6371 transitions. [2021-06-05 06:53:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:53:32,080 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:32,083 INFO L225 Difference]: With dead ends: 1996 [2021-06-05 06:53:32,083 INFO L226 Difference]: Without dead ends: 1956 [2021-06-05 06:53:32,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2479.3ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:53:32,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-06-05 06:53:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1468. [2021-06-05 06:53:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.319700068166326) internal successors, (4870), 1467 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4870 transitions. [2021-06-05 06:53:32,103 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4870 transitions. Word has length 26 [2021-06-05 06:53:32,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:32,103 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4870 transitions. [2021-06-05 06:53:32,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4870 transitions. [2021-06-05 06:53:32,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:32,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:32,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:32,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:32,321 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:32,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:32,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2057127289, now seen corresponding path program 21 times [2021-06-05 06:53:32,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:32,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548783685] [2021-06-05 06:53:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:32,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:32,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548783685] [2021-06-05 06:53:32,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548783685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:32,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699682164] [2021-06-05 06:53:32,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:32,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:53:32,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:32,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:53:32,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:33,119 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:33,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:53:33,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,132 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:33,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:53:33,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,151 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:53:33,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:53:33,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,174 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:33,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:53:33,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,189 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:33,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:33,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,212 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:33,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:53:33,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,235 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:33,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 06:53:33,237 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,247 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:33,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:33,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,269 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:33,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 06:53:33,270 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,281 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:33,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:33,281 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,291 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:33,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:33,292 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,314 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:33,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 06:53:33,315 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,325 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:33,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:33,326 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:33,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:53:33,344 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,355 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:33,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:53:33,356 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,363 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:33,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:33,364 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:33,588 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-06-05 06:53:33,588 INFO L628 ElimStorePlain]: treesize reduction 156, result has 50.5 percent of original size [2021-06-05 06:53:33,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:53:33,596 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:873, output treesize:221 [2021-06-05 06:53:33,750 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 06:53:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:33,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699682164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:33,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:33,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:53:33,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888712348] [2021-06-05 06:53:33,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:33,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:33,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:33,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:33,944 INFO L87 Difference]: Start difference. First operand 1468 states and 4870 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:34,620 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 06:53:35,013 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 06:53:35,240 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 06:53:35,537 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 06:53:35,771 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-06-05 06:53:36,073 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-06-05 06:53:36,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:36,143 INFO L93 Difference]: Finished difference Result 2188 states and 6976 transitions. [2021-06-05 06:53:36,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:53:36,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:36,147 INFO L225 Difference]: With dead ends: 2188 [2021-06-05 06:53:36,147 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 06:53:36,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2482.9ms TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:53:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 06:53:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1486. [2021-06-05 06:53:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.3252525252525253) internal successors, (4938), 1485 states have internal predecessors, (4938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4938 transitions. [2021-06-05 06:53:36,178 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4938 transitions. Word has length 26 [2021-06-05 06:53:36,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:36,178 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4938 transitions. [2021-06-05 06:53:36,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4938 transitions. [2021-06-05 06:53:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:36,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:36,181 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:36,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1040,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:36,382 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:36,382 INFO L82 PathProgramCache]: Analyzing trace with hash 309162187, now seen corresponding path program 22 times [2021-06-05 06:53:36,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:36,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171430911] [2021-06-05 06:53:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:36,748 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-05 06:53:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:37,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:37,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171430911] [2021-06-05 06:53:37,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171430911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:37,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413169871] [2021-06-05 06:53:37,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:37,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:37,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:37,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:53:37,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:37,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:37,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:37,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:53:37,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:37,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:53:37,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,546 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 06:53:37,547 INFO L628 ElimStorePlain]: treesize reduction 106, result has 62.4 percent of original size [2021-06-05 06:53:37,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:37,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:53:37,553 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:37,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:37,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:37,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:37,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:37,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:37,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:53:37,683 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:37,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:53:37,688 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:37,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:53:37,738 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:337, output treesize:72 [2021-06-05 06:53:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:37,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413169871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:37,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:37,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:53:37,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721135399] [2021-06-05 06:53:37,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:53:37,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:37,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:53:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:53:37,815 INFO L87 Difference]: Start difference. First operand 1486 states and 4938 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:38,163 INFO L93 Difference]: Finished difference Result 1609 states and 5273 transitions. [2021-06-05 06:53:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:53:38,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:38,165 INFO L225 Difference]: With dead ends: 1609 [2021-06-05 06:53:38,166 INFO L226 Difference]: Without dead ends: 1594 [2021-06-05 06:53:38,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 895.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-06-05 06:53:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1492. [2021-06-05 06:53:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.3272971160295106) internal successors, (4961), 1491 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4961 transitions. [2021-06-05 06:53:38,183 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4961 transitions. Word has length 26 [2021-06-05 06:53:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:38,183 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 4961 transitions. [2021-06-05 06:53:38,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:38,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4961 transitions. [2021-06-05 06:53:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:38,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:38,185 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:38,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:38,386 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:38,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1879987787, now seen corresponding path program 23 times [2021-06-05 06:53:38,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:38,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556000692] [2021-06-05 06:53:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:38,820 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-06-05 06:53:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:38,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:38,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556000692] [2021-06-05 06:53:38,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556000692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:38,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786982499] [2021-06-05 06:53:38,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:38,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:53:38,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:38,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:53:38,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:39,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:39,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:39,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:53:39,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:39,277 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:39,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:53:39,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:39,411 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 06:53:39,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:39,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:39,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:39,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:53:39,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:39,435 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:39,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:53:39,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:39,544 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 06:53:39,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:39,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:39,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:39,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:53:39,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:39,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:39,579 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:53:39,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:53:39,581 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:39,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:39,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:39,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:39,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:53:39,692 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:39,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:39,704 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:53:39,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 06:53:39,705 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:39,870 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-06-05 06:53:39,870 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.4 percent of original size [2021-06-05 06:53:39,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:53:39,876 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:377, output treesize:160 [2021-06-05 06:53:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:40,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786982499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:40,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:40,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:40,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456518488] [2021-06-05 06:53:40,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:40,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:40,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:40,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:40,063 INFO L87 Difference]: Start difference. First operand 1492 states and 4961 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:41,054 INFO L93 Difference]: Finished difference Result 1996 states and 6490 transitions. [2021-06-05 06:53:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:53:41,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:41,057 INFO L225 Difference]: With dead ends: 1996 [2021-06-05 06:53:41,058 INFO L226 Difference]: Without dead ends: 1971 [2021-06-05 06:53:41,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1369.5ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:53:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-06-05 06:53:41,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1499. [2021-06-05 06:53:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.3317757009345796) internal successors, (4991), 1498 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4991 transitions. [2021-06-05 06:53:41,076 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4991 transitions. Word has length 26 [2021-06-05 06:53:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:41,076 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 4991 transitions. [2021-06-05 06:53:41,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4991 transitions. [2021-06-05 06:53:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:41,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:41,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:41,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:41,279 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:41,279 INFO L82 PathProgramCache]: Analyzing trace with hash -224872725, now seen corresponding path program 24 times [2021-06-05 06:53:41,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:41,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911167493] [2021-06-05 06:53:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:41,741 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2021-06-05 06:53:42,000 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2021-06-05 06:53:42,219 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-06-05 06:53:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:42,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:42,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911167493] [2021-06-05 06:53:42,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911167493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:42,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545297250] [2021-06-05 06:53:42,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:42,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:53:42,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:53:42,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:42,919 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 06:53:43,233 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 96 [2021-06-05 06:53:43,330 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_125], 6=[v_prenex_123, v_prenex_124, v_prenex_126]} [2021-06-05 06:53:43,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:43,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:43,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:53:43,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:43,516 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-06-05 06:53:43,516 INFO L628 ElimStorePlain]: treesize reduction 263, result has 47.9 percent of original size [2021-06-05 06:53:43,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:43,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:43,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:43,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:43,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:43,596 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 06:53:43,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 35 [2021-06-05 06:53:43,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:43,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:43,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:43,673 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:53:43,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 06:53:43,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:43,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:43,762 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:53:43,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 48 [2021-06-05 06:53:43,763 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:43,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:43,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:53:43,812 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:521, output treesize:74 [2021-06-05 06:53:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:43,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545297250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:43,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:43,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:43,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815963276] [2021-06-05 06:53:43,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:43,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:43,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:43,894 INFO L87 Difference]: Start difference. First operand 1499 states and 4991 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:44,122 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 32 [2021-06-05 06:53:44,769 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-06-05 06:53:45,210 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 06:53:45,626 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 123 [2021-06-05 06:53:45,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:45,770 INFO L93 Difference]: Finished difference Result 1881 states and 6161 transitions. [2021-06-05 06:53:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:53:45,770 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:45,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:45,773 INFO L225 Difference]: With dead ends: 1881 [2021-06-05 06:53:45,773 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 06:53:45,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3067.5ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:53:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 06:53:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1508. [2021-06-05 06:53:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 3.33178500331785) internal successors, (5021), 1507 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 5021 transitions. [2021-06-05 06:53:45,791 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 5021 transitions. Word has length 26 [2021-06-05 06:53:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:45,791 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 5021 transitions. [2021-06-05 06:53:45,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 5021 transitions. [2021-06-05 06:53:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:45,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:45,792 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:45,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-05 06:53:45,993 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1842405505, now seen corresponding path program 25 times [2021-06-05 06:53:45,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:45,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845551169] [2021-06-05 06:53:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:46,261 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-06-05 06:53:46,410 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-06-05 06:53:46,558 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-05 06:53:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:46,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845551169] [2021-06-05 06:53:46,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845551169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:46,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921039022] [2021-06-05 06:53:46,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:46,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:46,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:47,348 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 06:53:47,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,533 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-06-05 06:53:47,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 68 [2021-06-05 06:53:47,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,551 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 06:53:47,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 1 [2021-06-05 06:53:47,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,994 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 173 [2021-06-05 06:53:47,994 INFO L628 ElimStorePlain]: treesize reduction 703, result has 43.6 percent of original size [2021-06-05 06:53:48,010 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:53:48,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 06:53:48,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:48,160 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 06:53:48,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:48,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:48,178 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:53:48,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 35 [2021-06-05 06:53:48,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:48,461 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 150 [2021-06-05 06:53:48,461 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.4 percent of original size [2021-06-05 06:53:48,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:48,478 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:53:48,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 38 [2021-06-05 06:53:48,479 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:48,619 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-05 06:53:48,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:48,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:48,645 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:53:48,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-06-05 06:53:48,646 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:48,782 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 06:53:48,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:48,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:48,802 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 06:53:48,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 06:53:48,803 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:48,926 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 06:53:48,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:48,940 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:53:48,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-06-05 06:53:48,941 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:49,059 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 06:53:49,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:49,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:49,081 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:53:49,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 55 [2021-06-05 06:53:49,084 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:49,206 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:53:49,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:49,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:53:49,216 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-06-05 06:53:49,369 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 06:53:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:49,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921039022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:49,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:49,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:49,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301849868] [2021-06-05 06:53:49,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:49,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:49,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:49,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:49,453 INFO L87 Difference]: Start difference. First operand 1508 states and 5021 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:50,135 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-06-05 06:53:50,509 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 06:53:50,707 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 06:53:51,336 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-06-05 06:53:51,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:51,494 INFO L93 Difference]: Finished difference Result 2002 states and 6531 transitions. [2021-06-05 06:53:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:53:51,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:51,497 INFO L225 Difference]: With dead ends: 2002 [2021-06-05 06:53:51,497 INFO L226 Difference]: Without dead ends: 1983 [2021-06-05 06:53:51,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2964.7ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:53:51,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-06-05 06:53:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1511. [2021-06-05 06:53:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 3.3350993377483444) internal successors, (5036), 1510 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 5036 transitions. [2021-06-05 06:53:51,516 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 5036 transitions. Word has length 26 [2021-06-05 06:53:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:51,516 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 5036 transitions. [2021-06-05 06:53:51,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 5036 transitions. [2021-06-05 06:53:51,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:51,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:51,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:51,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-05 06:53:51,719 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash 762618887, now seen corresponding path program 26 times [2021-06-05 06:53:51,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:51,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690743145] [2021-06-05 06:53:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:52,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:52,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690743145] [2021-06-05 06:53:52,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690743145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:52,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014851775] [2021-06-05 06:53:52,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:52,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:52,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:52,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:53:52,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:52,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,523 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:53:52,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:53:52,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:52,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:53:52,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,555 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:52,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:52,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:52,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:53:52,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,591 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:52,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:52,593 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:52,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:53:52,611 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:52,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:53:52,630 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,644 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:52,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:53:52,645 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,662 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:52,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:52,663 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,676 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:52,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:52,677 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,689 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:52,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:53:52,691 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:52,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:52,704 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,718 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:52,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:53:52,719 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,733 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:52,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:53:52,734 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,745 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:52,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:52,746 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,755 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:52,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:53:52,756 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,916 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-06-05 06:53:52,916 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-05 06:53:52,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:53:52,918 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 06:53:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:53,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014851775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:53,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:53,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:53:53,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201236164] [2021-06-05 06:53:53,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:53,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:53,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:53,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:53,067 INFO L87 Difference]: Start difference. First operand 1511 states and 5036 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:53,436 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-06-05 06:53:53,760 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-05 06:53:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:54,484 INFO L93 Difference]: Finished difference Result 2063 states and 6723 transitions. [2021-06-05 06:53:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:53:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:54,488 INFO L225 Difference]: With dead ends: 2063 [2021-06-05 06:53:54,488 INFO L226 Difference]: Without dead ends: 2038 [2021-06-05 06:53:54,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1694.4ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:53:54,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-06-05 06:53:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1517. [2021-06-05 06:53:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3337730870712403) internal successors, (5054), 1516 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5054 transitions. [2021-06-05 06:53:54,506 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5054 transitions. Word has length 26 [2021-06-05 06:53:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:54,506 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5054 transitions. [2021-06-05 06:53:54,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5054 transitions. [2021-06-05 06:53:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:54,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:54,508 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:54,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:54,708 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2136387655, now seen corresponding path program 42 times [2021-06-05 06:53:54,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:54,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246178283] [2021-06-05 06:53:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:55,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:55,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246178283] [2021-06-05 06:53:55,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246178283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:55,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974485905] [2021-06-05 06:53:55,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:55,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:53:55,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:55,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:53:55,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 35 [2021-06-05 06:53:55,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2021-06-05 06:53:55,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 06:53:55,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-06-05 06:53:55,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 15 [2021-06-05 06:53:55,908 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2021-06-05 06:53:55,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 21 [2021-06-05 06:53:55,931 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:53:55,942 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 30 [2021-06-05 06:53:55,954 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 06:53:55,965 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 35 [2021-06-05 06:53:55,976 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 30 [2021-06-05 06:53:55,988 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:55,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:55,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 32 [2021-06-05 06:53:55,999 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:56,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:56,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:56,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:56,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:56,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:56,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:56,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 30 [2021-06-05 06:53:56,010 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:56,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:56,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:56,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:56,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:56,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:56,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:56,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 29 [2021-06-05 06:53:56,020 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:56,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:56,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:56,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:56,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 21 [2021-06-05 06:53:56,026 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:56,073 INFO L628 ElimStorePlain]: treesize reduction 44, result has 49.4 percent of original size [2021-06-05 06:53:56,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:53:56,074 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1121, output treesize:33 [2021-06-05 06:53:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:56,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974485905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:56,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:56,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:53:56,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342981459] [2021-06-05 06:53:56,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:56,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:56,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:56,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:56,119 INFO L87 Difference]: Start difference. First operand 1517 states and 5054 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:57,454 INFO L93 Difference]: Finished difference Result 1955 states and 6355 transitions. [2021-06-05 06:53:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:53:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:57,458 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 06:53:57,459 INFO L226 Difference]: Without dead ends: 1929 [2021-06-05 06:53:57,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1573.0ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:53:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-05 06:53:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1521. [2021-06-05 06:53:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-06-05 06:53:57,485 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-06-05 06:53:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:57,485 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-06-05 06:53:57,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-06-05 06:53:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:57,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:57,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:57,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-06-05 06:53:57,701 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1090705077, now seen corresponding path program 43 times [2021-06-05 06:53:57,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:57,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391207133] [2021-06-05 06:53:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:58,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:58,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391207133] [2021-06-05 06:53:58,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391207133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:58,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012127859] [2021-06-05 06:53:58,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:58,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:58,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:58,646 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 06:53:58,724 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_143], 6=[v_prenex_141, v_prenex_145]} [2021-06-05 06:53:58,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:58,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:58,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:58,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 21 [2021-06-05 06:53:58,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:58,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:58,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:58,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-06-05 06:53:58,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:58,917 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 06:53:58,918 INFO L628 ElimStorePlain]: treesize reduction 221, result has 44.2 percent of original size [2021-06-05 06:53:58,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:58,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 06:53:58,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:58,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:58,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:58,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:58,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:58,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:58,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 06:53:58,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:59,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:59,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:59,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:59,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 06:53:59,024 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:59,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:53:59,061 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:483, output treesize:57 [2021-06-05 06:53:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:59,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012127859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:59,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:59,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:53:59,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252145549] [2021-06-05 06:53:59,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:59,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:59,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:59,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:59,122 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:00,596 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 06:54:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:00,731 INFO L93 Difference]: Finished difference Result 2127 states and 6917 transitions. [2021-06-05 06:54:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:54:00,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:00,734 INFO L225 Difference]: With dead ends: 2127 [2021-06-05 06:54:00,734 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 06:54:00,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2098.9ms TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:54:00,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 06:54:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1521. [2021-06-05 06:54:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-06-05 06:54:00,753 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-06-05 06:54:00,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:00,753 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-06-05 06:54:00,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-06-05 06:54:00,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:00,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:00,755 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:00,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1283,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:00,956 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:00,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1679080501, now seen corresponding path program 27 times [2021-06-05 06:54:00,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:00,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774315583] [2021-06-05 06:54:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:01,319 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 06:54:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:01,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:01,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774315583] [2021-06-05 06:54:01,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774315583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:01,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915578196] [2021-06-05 06:54:01,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:01,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:54:01,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:01,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:54:01,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:02,140 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 06:54:02,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:02,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:02,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:02,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:54:02,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:02,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:02,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:54:02,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:02,327 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:54:02,328 INFO L628 ElimStorePlain]: treesize reduction 39, result has 81.0 percent of original size [2021-06-05 06:54:02,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:02,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:02,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:02,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:54:02,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:02,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:02,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:54:02,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:02,427 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.2 percent of original size [2021-06-05 06:54:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:02,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:02,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:54:02,433 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:02,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:02,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:02,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:54:02,476 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:02,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:02,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:54:02,512 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 06:54:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:02,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915578196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:02,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:02,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:54:02,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683983691] [2021-06-05 06:54:02,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:54:02,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:02,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:54:02,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:54:02,584 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:03,102 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 06:54:03,926 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-06-05 06:54:04,177 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 06:54:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:04,330 INFO L93 Difference]: Finished difference Result 1978 states and 6388 transitions. [2021-06-05 06:54:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:54:04,330 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:04,333 INFO L225 Difference]: With dead ends: 1978 [2021-06-05 06:54:04,333 INFO L226 Difference]: Without dead ends: 1963 [2021-06-05 06:54:04,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2230.6ms TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:54:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-06-05 06:54:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1529. [2021-06-05 06:54:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-06-05 06:54:04,352 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-06-05 06:54:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:04,352 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-06-05 06:54:04,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-06-05 06:54:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:04,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:04,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:04,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-05 06:54:04,557 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:04,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:04,557 INFO L82 PathProgramCache]: Analyzing trace with hash -128698937, now seen corresponding path program 44 times [2021-06-05 06:54:04,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:04,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687407064] [2021-06-05 06:54:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:04,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:04,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687407064] [2021-06-05 06:54:04,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687407064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:04,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823783208] [2021-06-05 06:54:04,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:05,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:05,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:54:05,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:05,412 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 06:54:05,712 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_170, v_prenex_172, v_prenex_162, v_prenex_164], 5=[A, v_prenex_175, v_prenex_166, v_prenex_168]} [2021-06-05 06:54:05,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:05,741 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:54:05,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:54:05,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:06,118 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 156 [2021-06-05 06:54:06,119 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-06-05 06:54:06,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:06,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:06,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 06:54:06,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:54:06,543 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 151 [2021-06-05 06:54:06,544 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-06-05 06:54:06,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:06,571 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:54:06,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:54:06,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:06,767 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 06:54:06,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:06,792 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:54:06,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2021-06-05 06:54:06,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:06,987 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 06:54:06,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:06,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:07,016 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:54:07,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 06:54:07,019 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:07,406 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 134 [2021-06-05 06:54:07,407 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.2 percent of original size [2021-06-05 06:54:07,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:07,431 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:54:07,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2021-06-05 06:54:07,433 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:07,613 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-05 06:54:07,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:07,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:07,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:07,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 40 [2021-06-05 06:54:07,651 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:07,845 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 06:54:07,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:07,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:07,867 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:54:07,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 06:54:07,871 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:08,056 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 06:54:08,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:08,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:54:08,087 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:473, output treesize:269 [2021-06-05 06:54:08,226 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-05 06:54:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:08,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823783208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:08,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:08,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:54:08,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408695797] [2021-06-05 06:54:08,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:54:08,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:08,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:54:08,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:54:08,286 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:08,721 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-06-05 06:54:09,000 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2021-06-05 06:54:09,424 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-05 06:54:10,535 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-06-05 06:54:10,750 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-05 06:54:10,936 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-06-05 06:54:11,467 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-05 06:54:11,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:11,879 INFO L93 Difference]: Finished difference Result 2479 states and 7802 transitions. [2021-06-05 06:54:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:54:11,879 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:11,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:11,883 INFO L225 Difference]: With dead ends: 2479 [2021-06-05 06:54:11,883 INFO L226 Difference]: Without dead ends: 2435 [2021-06-05 06:54:11,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 3639.1ms TimeCoverageRelationStatistics Valid=513, Invalid=2567, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:54:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-06-05 06:54:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1529. [2021-06-05 06:54:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-06-05 06:54:11,904 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-06-05 06:54:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:11,904 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-06-05 06:54:11,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-06-05 06:54:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:11,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:11,906 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:12,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1305,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:12,107 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:12,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1105017781, now seen corresponding path program 45 times [2021-06-05 06:54:12,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:12,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76336550] [2021-06-05 06:54:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:12,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:12,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76336550] [2021-06-05 06:54:12,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76336550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:12,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914039119] [2021-06-05 06:54:12,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:12,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:54:12,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:12,634 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 06:54:12,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:13,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,402 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:54:13,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 54 [2021-06-05 06:54:13,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,452 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 06:54:13,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 67 [2021-06-05 06:54:13,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,533 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:54:13,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-05 06:54:13,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,589 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:54:13,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 57 [2021-06-05 06:54:13,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,661 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-06-05 06:54:13,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 06:54:13,665 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,733 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 06:54:13,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-06-05 06:54:13,744 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,800 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-06-05 06:54:13,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 43 [2021-06-05 06:54:13,803 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,850 INFO L354 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2021-06-05 06:54:13,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 50 [2021-06-05 06:54:13,852 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,911 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 06:54:13,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-06-05 06:54:13,924 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,989 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-05 06:54:13,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 77 [2021-06-05 06:54:14,020 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:14,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:14,047 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:14,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:54:14,048 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:14,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:14,075 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:14,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:54:14,075 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:14,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:14,103 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:14,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 06:54:14,104 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:14,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:14,132 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:14,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 1 [2021-06-05 06:54:14,132 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:14,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:14,161 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:14,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 06:54:14,162 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:14,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:14,181 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:14,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 1 [2021-06-05 06:54:14,182 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:14,800 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 96 [2021-06-05 06:54:14,800 INFO L628 ElimStorePlain]: treesize reduction 622, result has 44.9 percent of original size [2021-06-05 06:54:14,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:54:14,829 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1289, output treesize:912 [2021-06-05 06:54:15,349 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2021-06-05 06:54:15,515 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 06:54:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:15,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914039119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:15,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:15,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:54:15,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470583651] [2021-06-05 06:54:15,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:54:15,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:15,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:54:15,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:54:15,597 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:16,823 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 06:54:17,248 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 06:54:17,384 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 06:54:17,530 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 06:54:17,691 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-05 06:54:18,056 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 06:54:18,221 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 06:54:18,413 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 06:54:18,677 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 06:54:18,916 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 06:54:19,463 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-06-05 06:54:19,938 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-06-05 06:54:20,226 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 63 [2021-06-05 06:54:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:20,378 INFO L93 Difference]: Finished difference Result 2975 states and 9347 transitions. [2021-06-05 06:54:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:54:20,379 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:20,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:20,383 INFO L225 Difference]: With dead ends: 2975 [2021-06-05 06:54:20,383 INFO L226 Difference]: Without dead ends: 2945 [2021-06-05 06:54:20,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 5214.6ms TimeCoverageRelationStatistics Valid=517, Invalid=2789, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:54:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-06-05 06:54:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 1537. [2021-06-05 06:54:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.3430989583333335) internal successors, (5135), 1536 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5135 transitions. [2021-06-05 06:54:20,406 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5135 transitions. Word has length 26 [2021-06-05 06:54:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:20,406 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 5135 transitions. [2021-06-05 06:54:20,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5135 transitions. [2021-06-05 06:54:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:20,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:20,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:20,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:20,608 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:20,609 INFO L82 PathProgramCache]: Analyzing trace with hash -89210125, now seen corresponding path program 28 times [2021-06-05 06:54:20,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:20,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339620321] [2021-06-05 06:54:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:20,928 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-05 06:54:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:21,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:21,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339620321] [2021-06-05 06:54:21,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339620321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:21,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059864358] [2021-06-05 06:54:21,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:21,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:21,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:21,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:54:21,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:21,542 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 06:54:21,736 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2021-06-05 06:54:21,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:21,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:21,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:54:21,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:21,956 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:54:21,957 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.1 percent of original size [2021-06-05 06:54:21,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:21,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:21,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:54:21,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:22,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:22,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:22,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:22,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:22,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:54:22,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:22,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:22,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:54:22,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:22,116 INFO L628 ElimStorePlain]: treesize reduction 19, result has 83.9 percent of original size [2021-06-05 06:54:22,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:22,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:22,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:54:22,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:22,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:22,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:54:22,160 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 06:54:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:22,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059864358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:22,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:22,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:54:22,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497317840] [2021-06-05 06:54:22,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:54:22,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:22,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:54:22,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:54:22,241 INFO L87 Difference]: Start difference. First operand 1537 states and 5135 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:22,809 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 06:54:23,092 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 06:54:23,464 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 06:54:23,737 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 06:54:24,034 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 06:54:24,227 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 06:54:24,526 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-06-05 06:54:24,775 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-06-05 06:54:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:24,927 INFO L93 Difference]: Finished difference Result 2083 states and 6714 transitions. [2021-06-05 06:54:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:54:24,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:24,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:24,930 INFO L225 Difference]: With dead ends: 2083 [2021-06-05 06:54:24,930 INFO L226 Difference]: Without dead ends: 2068 [2021-06-05 06:54:24,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 3060.3ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:54:24,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-06-05 06:54:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1540. [2021-06-05 06:54:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 3.3443794671864846) internal successors, (5147), 1539 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 5147 transitions. [2021-06-05 06:54:24,950 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 5147 transitions. Word has length 26 [2021-06-05 06:54:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:24,950 INFO L482 AbstractCegarLoop]: Abstraction has 1540 states and 5147 transitions. [2021-06-05 06:54:24,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 5147 transitions. [2021-06-05 06:54:24,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:24,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:24,952 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:25,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1508,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:25,153 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:25,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1706742905, now seen corresponding path program 29 times [2021-06-05 06:54:25,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:25,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215172446] [2021-06-05 06:54:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:25,363 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 06:54:25,539 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 06:54:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:25,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:25,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215172446] [2021-06-05 06:54:25,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215172446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:25,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011609415] [2021-06-05 06:54:25,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:25,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:54:25,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:25,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:54:25,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:26,268 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 06:54:26,514 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 06:54:26,598 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:54:26,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 46 [2021-06-05 06:54:26,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:26,755 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2021-06-05 06:54:26,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:26,771 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:54:26,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 43 [2021-06-05 06:54:26,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:26,923 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-06-05 06:54:26,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:26,943 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:54:26,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 57 [2021-06-05 06:54:26,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:27,093 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 06:54:27,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:27,112 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:54:27,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 06:54:27,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:27,260 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 06:54:27,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:27,295 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:54:27,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 50 [2021-06-05 06:54:27,297 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:27,438 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:54:27,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:27,454 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:54:27,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 06:54:27,456 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:27,585 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 06:54:27,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:27,598 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:54:27,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 53 [2021-06-05 06:54:27,600 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:27,717 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 06:54:27,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:27,732 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:54:27,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2021-06-05 06:54:27,735 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:27,957 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-05 06:54:27,957 INFO L628 ElimStorePlain]: treesize reduction 8, result has 96.6 percent of original size [2021-06-05 06:54:27,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:54:27,965 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:687, output treesize:216 [2021-06-05 06:54:28,104 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-05 06:54:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:28,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011609415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:28,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:28,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:54:28,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004716693] [2021-06-05 06:54:28,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:54:28,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:28,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:54:28,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:54:28,189 INFO L87 Difference]: Start difference. First operand 1540 states and 5147 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:28,747 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-05 06:54:29,051 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 06:54:29,655 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-06-05 06:54:30,526 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2021-06-05 06:54:31,001 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 124 [2021-06-05 06:54:31,558 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2021-06-05 06:54:32,159 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 128 [2021-06-05 06:54:32,813 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 123 [2021-06-05 06:54:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:33,364 INFO L93 Difference]: Finished difference Result 2320 states and 7403 transitions. [2021-06-05 06:54:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:54:33,365 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:33,368 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 06:54:33,368 INFO L226 Difference]: Without dead ends: 2301 [2021-06-05 06:54:33,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 5455.5ms TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:54:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-05 06:54:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1535. [2021-06-05 06:54:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3428943937418514) internal successors, (5128), 1534 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5128 transitions. [2021-06-05 06:54:33,390 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5128 transitions. Word has length 26 [2021-06-05 06:54:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:33,390 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5128 transitions. [2021-06-05 06:54:33,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5128 transitions. [2021-06-05 06:54:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:33,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:33,392 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:33,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1517,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:33,593 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash 97294587, now seen corresponding path program 46 times [2021-06-05 06:54:33,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:33,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970289556] [2021-06-05 06:54:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:34,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970289556] [2021-06-05 06:54:34,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970289556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114101588] [2021-06-05 06:54:34,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:34,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:34,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:34,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:54:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:34,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 06:54:34,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 06:54:34,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:54:34,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 06:54:34,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:54:34,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 06:54:34,816 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:54:34,824 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 06:54:34,832 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:54:34,841 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:54:34,849 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 06:54:34,857 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:54:34,865 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 06:54:34,873 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 06:54:34,881 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:54:34,889 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:34,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:34,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 06:54:34,894 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:34,938 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-06-05 06:54:34,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:54:34,939 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-06-05 06:54:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:34,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114101588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:34,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:34,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 06:54:34,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157263836] [2021-06-05 06:54:34,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:54:34,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:34,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:54:34,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:54:34,983 INFO L87 Difference]: Start difference. First operand 1535 states and 5128 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:35,695 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 06:54:37,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:37,283 INFO L93 Difference]: Finished difference Result 3148 states and 9991 transitions. [2021-06-05 06:54:37,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:54:37,284 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:37,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:37,288 INFO L225 Difference]: With dead ends: 3148 [2021-06-05 06:54:37,288 INFO L226 Difference]: Without dead ends: 3112 [2021-06-05 06:54:37,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2377.0ms TimeCoverageRelationStatistics Valid=438, Invalid=1914, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:54:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-05 06:54:37,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 1630. [2021-06-05 06:54:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.365254757519951) internal successors, (5482), 1629 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5482 transitions. [2021-06-05 06:54:37,315 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5482 transitions. Word has length 26 [2021-06-05 06:54:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:37,315 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5482 transitions. [2021-06-05 06:54:37,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5482 transitions. [2021-06-05 06:54:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:37,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:37,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:37,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1531,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:37,517 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:37,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1930943239, now seen corresponding path program 47 times [2021-06-05 06:54:37,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:37,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326085030] [2021-06-05 06:54:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:38,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:38,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326085030] [2021-06-05 06:54:38,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326085030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:38,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006953568] [2021-06-05 06:54:38,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:38,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:54:38,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:38,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:54:38,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:38,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,741 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:54:38,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 06:54:38,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,765 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:38,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 06:54:38,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,783 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:38,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:54:38,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,800 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:38,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:54:38,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,827 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:54:38,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 39 [2021-06-05 06:54:38,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,854 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 06:54:38,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 06:54:38,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,873 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:38,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 06:54:38,874 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,890 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:38,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 06:54:38,891 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:38,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 60 [2021-06-05 06:54:38,928 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,946 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:38,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:54:38,947 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,963 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:38,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:54:38,965 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,982 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:38,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 1 [2021-06-05 06:54:38,983 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:38,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:38,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:39,000 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:39,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:54:39,001 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:39,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:39,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:39,018 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:39,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:54:39,020 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:39,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:39,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:39,037 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:39,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:54:39,038 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:39,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:39,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:39,049 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:39,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:54:39,050 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:39,153 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-06-05 06:54:39,153 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.2 percent of original size [2021-06-05 06:54:39,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:54:39,156 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:93 [2021-06-05 06:54:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:39,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006953568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:39,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:39,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 06:54:39,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171705925] [2021-06-05 06:54:39,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:54:39,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:39,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:54:39,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:54:39,336 INFO L87 Difference]: Start difference. First operand 1630 states and 5482 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:41,135 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 06:54:41,577 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 06:54:41,716 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-05 06:54:41,861 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 06:54:42,116 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 06:54:42,376 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 06:54:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:42,506 INFO L93 Difference]: Finished difference Result 3759 states and 11877 transitions. [2021-06-05 06:54:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:54:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:42,511 INFO L225 Difference]: With dead ends: 3759 [2021-06-05 06:54:42,511 INFO L226 Difference]: Without dead ends: 3702 [2021-06-05 06:54:42,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3240.0ms TimeCoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:54:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2021-06-05 06:54:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1786. [2021-06-05 06:54:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.3871148459383753) internal successors, (6046), 1785 states have internal predecessors, (6046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6046 transitions. [2021-06-05 06:54:42,542 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6046 transitions. Word has length 26 [2021-06-05 06:54:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:42,542 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 6046 transitions. [2021-06-05 06:54:42,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6046 transitions. [2021-06-05 06:54:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:42,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:42,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:42,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1645,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:42,745 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:42,745 INFO L82 PathProgramCache]: Analyzing trace with hash -513521361, now seen corresponding path program 30 times [2021-06-05 06:54:42,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:42,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062932178] [2021-06-05 06:54:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:42,984 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 99 [2021-06-05 06:54:43,201 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 52 [2021-06-05 06:54:43,402 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 06:54:43,591 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-06-05 06:54:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:43,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:43,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062932178] [2021-06-05 06:54:43,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062932178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:43,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750746213] [2021-06-05 06:54:43,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:43,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:54:43,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:54:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:44,446 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 06:54:44,739 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2021-06-05 06:54:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:45,018 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 06:54:45,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 1 [2021-06-05 06:54:45,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:45,056 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:54:45,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 68 [2021-06-05 06:54:45,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:45,616 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 179 [2021-06-05 06:54:45,617 INFO L628 ElimStorePlain]: treesize reduction 697, result has 46.5 percent of original size [2021-06-05 06:54:45,642 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:54:45,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-06-05 06:54:45,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:45,820 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 06:54:45,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:45,846 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:54:45,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 50 [2021-06-05 06:54:45,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:46,024 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 06:54:46,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:46,060 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-06-05 06:54:46,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 74 [2021-06-05 06:54:46,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:46,239 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 06:54:46,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:46,266 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:54:46,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-06-05 06:54:46,269 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:46,437 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 06:54:46,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:46,468 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:54:46,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 67 [2021-06-05 06:54:46,470 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:46,634 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 06:54:46,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:46,656 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:54:46,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-06-05 06:54:46,658 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:46,817 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 06:54:46,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:46,847 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:54:46,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 62 [2021-06-05 06:54:46,850 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:47,006 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 06:54:47,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:47,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:54:47,022 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1441, output treesize:516 [2021-06-05 06:54:47,289 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 06:54:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:47,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750746213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:47,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:47,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:54:47,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698076244] [2021-06-05 06:54:47,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:54:47,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:54:47,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:54:47,395 INFO L87 Difference]: Start difference. First operand 1786 states and 6046 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:47,611 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 39 [2021-06-05 06:54:47,994 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2021-06-05 06:54:48,350 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2021-06-05 06:54:48,840 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-05 06:54:49,280 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 06:54:49,652 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 06:54:49,934 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:54:50,256 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-06-05 06:54:50,910 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 126 [2021-06-05 06:54:52,161 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 241 DAG size of output: 229 [2021-06-05 06:54:52,781 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 152 [2021-06-05 06:54:53,806 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 160 [2021-06-05 06:54:55,636 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 286 DAG size of output: 266 [2021-06-05 06:54:57,055 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 262 DAG size of output: 240 [2021-06-05 06:54:58,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:58,069 INFO L93 Difference]: Finished difference Result 2363 states and 7775 transitions. [2021-06-05 06:54:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:54:58,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:58,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:58,072 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 06:54:58,072 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 06:54:58,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 10507.5ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:54:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 06:54:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1795. [2021-06-05 06:54:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-06-05 06:54:58,094 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-06-05 06:54:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:58,094 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-06-05 06:54:58,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-06-05 06:54:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:58,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:58,096 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:58,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1768 [2021-06-05 06:54:58,297 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2131054141, now seen corresponding path program 31 times [2021-06-05 06:54:58,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:58,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582888063] [2021-06-05 06:54:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:58,505 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-05 06:54:58,693 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-05 06:54:58,833 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 06:54:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:58,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:58,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582888063] [2021-06-05 06:54:58,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582888063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:58,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249001815] [2021-06-05 06:54:58,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:54:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:59,473 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 06:54:59,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,607 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 06:54:59,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 1 [2021-06-05 06:54:59,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,640 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:54:59,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 60 [2021-06-05 06:54:59,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:00,111 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 177 [2021-06-05 06:55:00,111 INFO L628 ElimStorePlain]: treesize reduction 703, result has 45.7 percent of original size [2021-06-05 06:55:00,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:00,135 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 06:55:00,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 06:55:00,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:00,301 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 06:55:00,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:00,316 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:55:00,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 06:55:00,318 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:00,461 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-06-05 06:55:00,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:00,484 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:55:00,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 42 [2021-06-05 06:55:00,487 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:00,763 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-06-05 06:55:00,764 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.3 percent of original size [2021-06-05 06:55:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:00,789 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:55:00,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-06-05 06:55:00,790 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:00,923 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 06:55:00,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:00,940 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:55:00,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-06-05 06:55:00,942 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:01,071 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 06:55:01,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:01,086 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:55:01,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-06-05 06:55:01,087 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:01,208 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 06:55:01,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:01,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:01,230 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:55:01,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-06-05 06:55:01,232 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:01,345 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 06:55:01,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:01,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:55:01,353 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-06-05 06:55:01,506 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-05 06:55:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:01,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249001815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:01,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:01,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:55:01,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447319965] [2021-06-05 06:55:01,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:55:01,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:01,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:55:01,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:55:01,608 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:01,910 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-05 06:55:02,101 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-06-05 06:55:02,332 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-05 06:55:03,071 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 06:55:03,428 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 06:55:03,907 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2021-06-05 06:55:04,169 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-05 06:55:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:04,353 INFO L93 Difference]: Finished difference Result 2510 states and 8287 transitions. [2021-06-05 06:55:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:55:04,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:04,357 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 06:55:04,357 INFO L226 Difference]: Without dead ends: 2491 [2021-06-05 06:55:04,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3343.7ms TimeCoverageRelationStatistics Valid=301, Invalid=1181, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:55:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-05 06:55:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1795. [2021-06-05 06:55:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-06-05 06:55:04,384 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-06-05 06:55:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:04,384 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-06-05 06:55:04,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-06-05 06:55:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:04,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:04,386 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:04,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1811,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:04,587 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash 473970251, now seen corresponding path program 32 times [2021-06-05 06:55:04,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:04,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228909880] [2021-06-05 06:55:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:04,941 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 06:55:05,072 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 06:55:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:05,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:05,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228909880] [2021-06-05 06:55:05,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228909880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:05,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743454603] [2021-06-05 06:55:05,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:05,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:55:05,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:05,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:55:05,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:05,811 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[v_prenex_239, A, v_prenex_237]} [2021-06-05 06:55:05,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:05,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:55:05,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:05,844 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:55:05,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:55:05,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,023 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:55:06,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:06,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:06,051 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:55:06,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 63 [2021-06-05 06:55:06,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,076 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:55:06,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 71 [2021-06-05 06:55:06,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,559 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2021-06-05 06:55:06,559 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.2 percent of original size [2021-06-05 06:55:06,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:06,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:06,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 57 [2021-06-05 06:55:06,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,606 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:55:06,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 06:55:06,609 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,899 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-06-05 06:55:06,899 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.4 percent of original size [2021-06-05 06:55:06,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:06,922 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:55:06,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 49 [2021-06-05 06:55:06,924 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,945 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:55:06,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 06:55:06,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:07,184 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 06:55:07,185 INFO L628 ElimStorePlain]: treesize reduction 39, result has 85.0 percent of original size [2021-06-05 06:55:07,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:55:07,196 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:641, output treesize:342 [2021-06-05 06:55:07,387 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-06-05 06:55:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:07,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743454603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:07,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:07,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:55:07,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822590099] [2021-06-05 06:55:07,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:55:07,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:07,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:55:07,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:55:07,584 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:07,800 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 30 [2021-06-05 06:55:08,094 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 06:55:08,295 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2021-06-05 06:55:08,576 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 06:55:08,770 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 64 [2021-06-05 06:55:08,994 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 06:55:09,127 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2021-06-05 06:55:09,401 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2021-06-05 06:55:09,568 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-05 06:55:09,949 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 06:55:10,243 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-06-05 06:55:10,492 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 06:55:10,657 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-05 06:55:11,292 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-06-05 06:55:11,633 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-05 06:55:12,281 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-06-05 06:55:12,963 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2021-06-05 06:55:13,561 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 95 [2021-06-05 06:55:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:13,996 INFO L93 Difference]: Finished difference Result 2613 states and 8461 transitions. [2021-06-05 06:55:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:55:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:14,000 INFO L225 Difference]: With dead ends: 2613 [2021-06-05 06:55:14,000 INFO L226 Difference]: Without dead ends: 2544 [2021-06-05 06:55:14,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 6792.4ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:55:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-06-05 06:55:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1779. [2021-06-05 06:55:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.3830146231721034) internal successors, (6015), 1778 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 6015 transitions. [2021-06-05 06:55:14,024 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 6015 transitions. Word has length 26 [2021-06-05 06:55:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:14,024 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 6015 transitions. [2021-06-05 06:55:14,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:14,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 6015 transitions. [2021-06-05 06:55:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:14,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:14,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:14,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1845,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:14,227 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:14,228 INFO L82 PathProgramCache]: Analyzing trace with hash -923228447, now seen corresponding path program 48 times [2021-06-05 06:55:14,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:14,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071708681] [2021-06-05 06:55:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:14,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071708681] [2021-06-05 06:55:14,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071708681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502326317] [2021-06-05 06:55:14,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:14,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:55:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:55:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:15,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 06:55:15,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 06:55:15,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:55:15,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 06:55:15,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 06:55:15,350 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 06:55:15,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 06:55:15,378 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:55:15,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 06:55:15,406 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 06:55:15,421 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 06:55:15,433 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:55:15,447 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 06:55:15,462 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:55:15,476 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 06:55:15,491 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:15,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:15,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 06:55:15,499 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:15,580 INFO L628 ElimStorePlain]: treesize reduction 325, result has 11.2 percent of original size [2021-06-05 06:55:15,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:55:15,581 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1045, output treesize:29 [2021-06-05 06:55:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:15,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502326317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:15,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:15,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:55:15,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766244575] [2021-06-05 06:55:15,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:55:15,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:15,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:55:15,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:55:15,618 INFO L87 Difference]: Start difference. First operand 1779 states and 6015 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:17,113 INFO L93 Difference]: Finished difference Result 2238 states and 7371 transitions. [2021-06-05 06:55:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:55:17,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:17,117 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 06:55:17,117 INFO L226 Difference]: Without dead ends: 2216 [2021-06-05 06:55:17,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1568.2ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:55:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-06-05 06:55:17,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1764. [2021-06-05 06:55:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-06-05 06:55:17,138 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-06-05 06:55:17,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:17,138 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-06-05 06:55:17,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-06-05 06:55:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:17,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:17,140 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:17,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1873 [2021-06-05 06:55:17,341 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:17,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2265419, now seen corresponding path program 49 times [2021-06-05 06:55:17,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:17,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072495948] [2021-06-05 06:55:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:17,621 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 06:55:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:17,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:17,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072495948] [2021-06-05 06:55:17,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072495948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:17,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527160282] [2021-06-05 06:55:17,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:17,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:55:17,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:18,257 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 06:55:18,312 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_240], 5=[v_prenex_242, v_prenex_244]} [2021-06-05 06:55:18,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:55:18,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:18,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:55:18,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:18,466 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 06:55:18,467 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-06-05 06:55:18,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 06:55:18,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:18,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:18,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 06:55:18,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:18,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:18,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2021-06-05 06:55:18,572 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:18,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:18,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:55:18,610 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-06-05 06:55:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:18,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527160282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:18,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:18,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:55:18,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472173486] [2021-06-05 06:55:18,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:55:18,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:18,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:55:18,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:55:18,674 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:19,769 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-06-05 06:55:20,609 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 06:55:20,927 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-06-05 06:55:21,093 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2021-06-05 06:55:21,240 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2021-06-05 06:55:21,559 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 06:55:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:21,753 INFO L93 Difference]: Finished difference Result 2440 states and 8027 transitions. [2021-06-05 06:55:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:55:21,753 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:21,757 INFO L225 Difference]: With dead ends: 2440 [2021-06-05 06:55:21,757 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 06:55:21,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 3168.1ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:55:21,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 06:55:21,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1764. [2021-06-05 06:55:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-06-05 06:55:21,780 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-06-05 06:55:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:21,780 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-06-05 06:55:21,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-06-05 06:55:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:21,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:21,782 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:21,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1979,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:21,983 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:21,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:21,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1175639121, now seen corresponding path program 50 times [2021-06-05 06:55:21,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:21,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889043278] [2021-06-05 06:55:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:22,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:22,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889043278] [2021-06-05 06:55:22,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889043278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:22,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280158102] [2021-06-05 06:55:22,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:22,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:55:22,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:22,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:55:22,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:22,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,802 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-05 06:55:22,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 37 [2021-06-05 06:55:22,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:22,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:22,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 06:55:22,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:22,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,869 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 06:55:22,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 41 [2021-06-05 06:55:22,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:22,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,898 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 06:55:22,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-06-05 06:55:22,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,927 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 06:55:22,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 06:55:22,930 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:22,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,947 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:22,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 06:55:22,948 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:22,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,983 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-05 06:55:22,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 46 [2021-06-05 06:55:22,985 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:22,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:22,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,001 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:23,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:55:23,003 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:23,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,017 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:23,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:55:23,019 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:23,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,036 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:23,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:55:23,037 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:23,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,053 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:23,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:55:23,054 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:23,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,072 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:23,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 06:55:23,072 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,089 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:23,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:55:23,090 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:23,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,107 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:23,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 06:55:23,108 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:23,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,124 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:23,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:55:23,125 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:23,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:23,142 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 06:55:23,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2021-06-05 06:55:23,144 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:23,213 INFO L628 ElimStorePlain]: treesize reduction 145, result has 27.5 percent of original size [2021-06-05 06:55:23,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:55:23,214 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:55 [2021-06-05 06:55:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:23,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280158102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:23,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:23,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 06:55:23,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607835646] [2021-06-05 06:55:23,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:55:23,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:23,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:55:23,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:55:23,318 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:24,924 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 06:55:25,094 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-05 06:55:25,237 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-05 06:55:25,405 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 06:55:26,024 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:55:26,331 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-06-05 06:55:26,587 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 06:55:27,337 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 06:55:28,377 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 06:55:28,516 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-05 06:55:28,662 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 06:55:28,808 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 06:55:29,039 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 06:55:29,501 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 06:55:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:29,891 INFO L93 Difference]: Finished difference Result 3056 states and 9811 transitions. [2021-06-05 06:55:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:55:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:29,896 INFO L225 Difference]: With dead ends: 3056 [2021-06-05 06:55:29,896 INFO L226 Difference]: Without dead ends: 3009 [2021-06-05 06:55:29,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 6218.0ms TimeCoverageRelationStatistics Valid=1062, Invalid=5580, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 06:55:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-06-05 06:55:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1784. [2021-06-05 06:55:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.37633202467751) internal successors, (6020), 1783 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6020 transitions. [2021-06-05 06:55:29,924 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6020 transitions. Word has length 26 [2021-06-05 06:55:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:29,924 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 6020 transitions. [2021-06-05 06:55:29,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6020 transitions. [2021-06-05 06:55:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:29,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:29,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:30,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1993 [2021-06-05 06:55:30,127 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:30,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:30,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1573091019, now seen corresponding path program 51 times [2021-06-05 06:55:30,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:30,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703761389] [2021-06-05 06:55:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:30,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:30,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703761389] [2021-06-05 06:55:30,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703761389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:30,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374045688] [2021-06-05 06:55:30,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:30,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:55:30,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:55:30,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:31,129 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 06:55:31,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:31,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 66 [2021-06-05 06:55:31,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:55:31,665 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-05 06:55:31,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2021-06-05 06:55:31,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:32,868 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 201 DAG size of output: 180 [2021-06-05 06:55:32,869 INFO L628 ElimStorePlain]: treesize reduction 96, result has 91.8 percent of original size [2021-06-05 06:55:32,942 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 06:55:32,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2021-06-05 06:55:32,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,007 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-06-05 06:55:33,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 44 [2021-06-05 06:55:33,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:34,167 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 181 DAG size of output: 174 [2021-06-05 06:55:34,167 INFO L628 ElimStorePlain]: treesize reduction 21, result has 98.0 percent of original size [2021-06-05 06:55:34,245 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 06:55:34,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-06-05 06:55:34,271 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:34,326 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-06-05 06:55:34,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 41 [2021-06-05 06:55:34,327 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:35,618 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 200 DAG size of output: 187 [2021-06-05 06:55:35,618 INFO L628 ElimStorePlain]: treesize reduction 66, result has 94.1 percent of original size [2021-06-05 06:55:35,682 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 06:55:35,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 54 [2021-06-05 06:55:35,692 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:35,761 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 06:55:35,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-06-05 06:55:35,787 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:37,130 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 207 DAG size of output: 184 [2021-06-05 06:55:37,131 INFO L628 ElimStorePlain]: treesize reduction 163, result has 86.3 percent of original size [2021-06-05 06:55:37,206 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 06:55:37,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-06-05 06:55:37,219 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:37,320 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-06-05 06:55:37,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 52 [2021-06-05 06:55:37,327 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:39,400 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 202 DAG size of output: 192 [2021-06-05 06:55:39,401 INFO L628 ElimStorePlain]: treesize reduction 53, result has 95.1 percent of original size [2021-06-05 06:55:39,471 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-05 06:55:39,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2021-06-05 06:55:39,484 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:39,553 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 06:55:39,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 65 [2021-06-05 06:55:39,603 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:41,525 WARN L205 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 220 DAG size of output: 180 [2021-06-05 06:55:41,525 INFO L628 ElimStorePlain]: treesize reduction 304, result has 75.8 percent of original size [2021-06-05 06:55:41,599 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 06:55:41,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-06-05 06:55:41,623 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:41,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:41,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 80 [2021-06-05 06:55:41,799 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:43,317 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 279 DAG size of output: 208 [2021-06-05 06:55:43,318 INFO L628 ElimStorePlain]: treesize reduction 459, result has 68.3 percent of original size [2021-06-05 06:55:43,386 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 06:55:43,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2021-06-05 06:55:43,392 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:43,450 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-06-05 06:55:43,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 49 [2021-06-05 06:55:43,456 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:44,740 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 199 DAG size of output: 198 [2021-06-05 06:55:44,740 INFO L628 ElimStorePlain]: treesize reduction 8, result has 99.2 percent of original size [2021-06-05 06:55:45,155 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 261 [2021-06-05 06:55:45,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-05 06:55:45,158 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:1105, output treesize:5253 [2021-06-05 06:55:46,754 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 258 DAG size of output: 107 [2021-06-05 06:55:47,250 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 06:55:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:47,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374045688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:47,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:47,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:55:47,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752865725] [2021-06-05 06:55:47,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:55:47,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:47,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:55:47,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:55:47,558 INFO L87 Difference]: Start difference. First operand 1784 states and 6020 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:48,050 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 36 [2021-06-05 06:55:48,368 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 06:55:48,677 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 06:55:49,477 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 62 [2021-06-05 06:55:49,633 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 06:55:50,444 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-06-05 06:55:51,215 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 72 [2021-06-05 06:55:51,523 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2021-06-05 06:55:52,196 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 63 [2021-06-05 06:55:52,408 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 37 [2021-06-05 06:55:52,863 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-05 06:55:53,432 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-06-05 06:55:53,892 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 06:55:54,851 WARN L205 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 109 [2021-06-05 06:55:55,204 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2021-06-05 06:55:55,868 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2021-06-05 06:55:56,132 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 40 [2021-06-05 06:55:56,408 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 48 [2021-06-05 06:55:57,028 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 75 [2021-06-05 06:55:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:57,092 INFO L93 Difference]: Finished difference Result 2817 states and 9172 transitions. [2021-06-05 06:55:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:55:57,092 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:57,096 INFO L225 Difference]: With dead ends: 2817 [2021-06-05 06:55:57,096 INFO L226 Difference]: Without dead ends: 2787 [2021-06-05 06:55:57,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 11048.2ms TimeCoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:55:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-05 06:55:57,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1785. [2021-06-05 06:55:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-06-05 06:55:57,127 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-06-05 06:55:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:57,127 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-06-05 06:55:57,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-06-05 06:55:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:57,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:57,129 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:57,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:57,331 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:57,331 INFO L82 PathProgramCache]: Analyzing trace with hash 238696335, now seen corresponding path program 52 times [2021-06-05 06:55:57,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:57,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972026060] [2021-06-05 06:55:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:57,731 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 06:55:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:57,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:57,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972026060] [2021-06-05 06:55:57,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972026060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:57,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695177913] [2021-06-05 06:55:57,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:58,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:55:58,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:58,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:55:58,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:58,437 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 06:55:58,667 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_271, v_prenex_269], 6=[A, v_prenex_273]} [2021-06-05 06:55:58,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:58,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:58,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:58,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-06-05 06:55:58,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:58,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:58,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:58,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-06-05 06:55:58,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:58,871 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 06:55:58,871 INFO L628 ElimStorePlain]: treesize reduction 220, result has 44.2 percent of original size [2021-06-05 06:55:58,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:58,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 06:55:58,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:58,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:58,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:58,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:58,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:58,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 06:55:58,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:59,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:59,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:59,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:59,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 30 [2021-06-05 06:55:59,036 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:59,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:59,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:55:59,080 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:485, output treesize:67 [2021-06-05 06:55:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:59,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695177913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:59,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:59,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:55:59,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753040250] [2021-06-05 06:55:59,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:55:59,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:59,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:55:59,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:55:59,154 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:00,152 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-05 06:56:00,432 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 06:56:00,602 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 06:56:00,957 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-06-05 06:56:01,224 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-06-05 06:56:01,439 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-05 06:56:01,994 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-05 06:56:02,231 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 06:56:02,529 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 06:56:02,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:02,556 INFO L93 Difference]: Finished difference Result 2300 states and 7575 transitions. [2021-06-05 06:56:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:56:02,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:02,559 INFO L225 Difference]: With dead ends: 2300 [2021-06-05 06:56:02,559 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 06:56:02,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 3811.5ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:56:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 06:56:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1783. [2021-06-05 06:56:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.377665544332211) internal successors, (6019), 1782 states have internal predecessors, (6019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6019 transitions. [2021-06-05 06:56:02,579 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6019 transitions. Word has length 26 [2021-06-05 06:56:02,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:02,580 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6019 transitions. [2021-06-05 06:56:02,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6019 transitions. [2021-06-05 06:56:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:02,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:02,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:02,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2290 [2021-06-05 06:56:02,782 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:02,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:02,783 INFO L82 PathProgramCache]: Analyzing trace with hash -169937649, now seen corresponding path program 53 times [2021-06-05 06:56:02,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:02,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107252637] [2021-06-05 06:56:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:03,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:03,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107252637] [2021-06-05 06:56:03,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107252637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:03,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30807373] [2021-06-05 06:56:03,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:03,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:56:03,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:03,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:56:03,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:03,684 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 06:56:03,990 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 06:56:04,261 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_282, v_prenex_284, v_prenex_285, v_prenex_286, v_prenex_287, v_prenex_288], 6=[v_prenex_283]} [2021-06-05 06:56:04,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:04,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:04,313 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 06:56:04,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:56:04,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:04,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:04,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:04,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:04,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 46 [2021-06-05 06:56:04,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 06:56:05,472 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 201 DAG size of output: 192 [2021-06-05 06:56:05,473 INFO L628 ElimStorePlain]: treesize reduction 32, result has 97.5 percent of original size [2021-06-05 06:56:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:05,513 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:56:05,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 06:56:05,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:05,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:05,549 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:56:05,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 41 [2021-06-05 06:56:05,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:06,470 WARN L205 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 178 [2021-06-05 06:56:06,470 INFO L628 ElimStorePlain]: treesize reduction 50, result has 95.8 percent of original size [2021-06-05 06:56:06,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:06,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:06,516 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:56:06,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-06-05 06:56:06,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:06,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:06,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:06,555 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:56:06,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 41 [2021-06-05 06:56:06,560 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:07,399 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 166 [2021-06-05 06:56:07,399 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.6 percent of original size [2021-06-05 06:56:07,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:07,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:07,436 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:56:07,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 37 [2021-06-05 06:56:07,438 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:07,471 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:56:07,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 44 [2021-06-05 06:56:07,474 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:08,189 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 154 [2021-06-05 06:56:08,189 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.2 percent of original size [2021-06-05 06:56:08,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:08,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:08,225 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:56:08,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 06:56:08,228 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:08,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:08,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:08,264 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:56:08,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 06:56:08,267 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:08,597 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 06:56:08,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:08,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:08,633 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:56:08,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 06:56:08,636 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:08,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:08,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:08,653 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:56:08,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:56:08,654 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:09,220 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 131 [2021-06-05 06:56:09,220 INFO L628 ElimStorePlain]: treesize reduction 10, result has 98.7 percent of original size [2021-06-05 06:56:09,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:09,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:09,252 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:56:09,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 32 [2021-06-05 06:56:09,254 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:09,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:09,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:09,282 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:56:09,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-06-05 06:56:09,285 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:09,760 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 118 [2021-06-05 06:56:09,761 INFO L628 ElimStorePlain]: treesize reduction 37, result has 94.9 percent of original size [2021-06-05 06:56:09,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:09,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:09,805 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-05 06:56:09,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 176 treesize of output 104 [2021-06-05 06:56:09,816 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:09,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:09,829 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:56:09,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 1 [2021-06-05 06:56:09,830 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:10,215 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2021-06-05 06:56:10,215 INFO L628 ElimStorePlain]: treesize reduction 68, result has 85.0 percent of original size [2021-06-05 06:56:10,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 06:56:10,224 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1282, output treesize:291 [2021-06-05 06:56:10,368 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-06-05 06:56:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:10,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30807373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:10,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:10,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 06:56:10,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278585714] [2021-06-05 06:56:10,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:56:10,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:10,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:56:10,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:56:10,425 INFO L87 Difference]: Start difference. First operand 1783 states and 6019 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:12,459 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 06:56:17,418 WARN L205 SmtUtils]: Spent 4.73 s on a formula simplification. DAG size of input: 209 DAG size of output: 150 [2021-06-05 06:56:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:17,790 INFO L93 Difference]: Finished difference Result 2524 states and 8353 transitions. [2021-06-05 06:56:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:56:17,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:17,794 INFO L225 Difference]: With dead ends: 2524 [2021-06-05 06:56:17,794 INFO L226 Difference]: Without dead ends: 2509 [2021-06-05 06:56:17,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 7520.1ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:56:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-06-05 06:56:17,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1785. [2021-06-05 06:56:17,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-06-05 06:56:17,816 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-06-05 06:56:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:17,816 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-06-05 06:56:17,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-06-05 06:56:17,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:17,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:17,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:18,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2304,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:18,018 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash 597949447, now seen corresponding path program 54 times [2021-06-05 06:56:18,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:18,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744365654] [2021-06-05 06:56:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:18,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:18,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744365654] [2021-06-05 06:56:18,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744365654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:18,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806405715] [2021-06-05 06:56:18,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:18,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:56:18,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:18,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:56:18,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:18,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,729 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 06:56:18,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 06:56:18,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:18,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 06:56:18,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,787 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:56:18,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,807 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 06:56:18,808 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,827 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 06:56:18,827 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,846 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:56:18,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,866 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 06:56:18,867 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,885 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:56:18,886 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,902 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 06:56:18,903 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,921 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:56:18,922 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,938 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:56:18,940 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,958 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 06:56:18,959 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,976 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 06:56:18,977 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,994 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:18,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:56:18,996 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:19,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:19,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:19,013 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:19,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:56:19,014 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:19,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:19,035 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:19,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 06:56:19,036 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:19,069 INFO L628 ElimStorePlain]: treesize reduction 64, result has 29.7 percent of original size [2021-06-05 06:56:19,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:56:19,069 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:27 [2021-06-05 06:56:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:19,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806405715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:19,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:19,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 06:56:19,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129545629] [2021-06-05 06:56:19,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:56:19,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:19,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:56:19,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:56:19,139 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:20,445 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-06-05 06:56:20,851 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2021-06-05 06:56:21,007 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-06-05 06:56:21,462 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 06:56:21,791 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 06:56:21,976 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 06:56:22,204 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 06:56:22,499 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-06-05 06:56:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:23,093 INFO L93 Difference]: Finished difference Result 2886 states and 9372 transitions. [2021-06-05 06:56:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:56:23,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:23,098 INFO L225 Difference]: With dead ends: 2886 [2021-06-05 06:56:23,098 INFO L226 Difference]: Without dead ends: 2841 [2021-06-05 06:56:23,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 3721.3ms TimeCoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:56:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-06-05 06:56:23,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1790. [2021-06-05 06:56:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 3.377864728898826) internal successors, (6043), 1789 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 6043 transitions. [2021-06-05 06:56:23,126 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 6043 transitions. Word has length 26 [2021-06-05 06:56:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:23,126 INFO L482 AbstractCegarLoop]: Abstraction has 1790 states and 6043 transitions. [2021-06-05 06:56:23,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 6043 transitions. [2021-06-05 06:56:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:23,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:23,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:23,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2370 [2021-06-05 06:56:23,329 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:23,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:23,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1153824785, now seen corresponding path program 33 times [2021-06-05 06:56:23,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:23,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257682213] [2021-06-05 06:56:23,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:23,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:23,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257682213] [2021-06-05 06:56:23,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257682213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:23,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11769929] [2021-06-05 06:56:23,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:23,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:56:23,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:23,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:56:23,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:24,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:24,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:24,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:24,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:24,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:24,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:24,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:24,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:24,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:24,662 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 06:56:24,662 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-06-05 06:56:24,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:24,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:24,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:24,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:56:24,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:24,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:24,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:24,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:24,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:24,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:24,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:24,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:56:24,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:24,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:24,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:24,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:24,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:56:24,838 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:24,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:24,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:56:24,900 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-06-05 06:56:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:24,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11769929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:24,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:24,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:56:24,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375509] [2021-06-05 06:56:24,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:56:24,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:24,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:56:24,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:56:24,975 INFO L87 Difference]: Start difference. First operand 1790 states and 6043 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:25,956 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-05 06:56:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:26,237 INFO L93 Difference]: Finished difference Result 2197 states and 7293 transitions. [2021-06-05 06:56:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:56:26,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:26,240 INFO L225 Difference]: With dead ends: 2197 [2021-06-05 06:56:26,240 INFO L226 Difference]: Without dead ends: 2182 [2021-06-05 06:56:26,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1672.9ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:56:26,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-06-05 06:56:26,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1782. [2021-06-05 06:56:26,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-06-05 06:56:26,264 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-06-05 06:56:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:26,265 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-06-05 06:56:26,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:26,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-06-05 06:56:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:26,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:26,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:26,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:26,481 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:26,481 INFO L82 PathProgramCache]: Analyzing trace with hash -824665213, now seen corresponding path program 34 times [2021-06-05 06:56:26,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:26,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266980122] [2021-06-05 06:56:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:26,774 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-06-05 06:56:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:26,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:26,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266980122] [2021-06-05 06:56:26,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266980122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:26,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662597780] [2021-06-05 06:56:26,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:27,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:56:27,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:27,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:56:27,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:27,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,371 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:27,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 06:56:27,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,386 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:27,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 06:56:27,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,406 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:56:27,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-06-05 06:56:27,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,422 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:27,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 06:56:27,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,437 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:27,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 06:56:27,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,454 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:27,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 06:56:27,455 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,469 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:27,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 06:56:27,470 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,485 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:27,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 06:56:27,486 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,502 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:27,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 1 [2021-06-05 06:56:27,503 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,513 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:27,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 06:56:27,514 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,529 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:56:27,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 52 [2021-06-05 06:56:27,530 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,544 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:56:27,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 60 [2021-06-05 06:56:27,545 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,560 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:56:27,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 45 [2021-06-05 06:56:27,561 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,572 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:27,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 06:56:27,572 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:27,584 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:27,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 1 [2021-06-05 06:56:27,585 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,594 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 06:56:27,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 60 [2021-06-05 06:56:27,595 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,665 INFO L628 ElimStorePlain]: treesize reduction 47, result has 63.6 percent of original size [2021-06-05 06:56:27,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:56:27,667 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1445, output treesize:46 [2021-06-05 06:56:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:27,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662597780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:27,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:27,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:56:27,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683906593] [2021-06-05 06:56:27,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:56:27,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:27,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:56:27,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:56:27,711 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:28,498 INFO L93 Difference]: Finished difference Result 1968 states and 6539 transitions. [2021-06-05 06:56:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:56:28,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:28,502 INFO L225 Difference]: With dead ends: 1968 [2021-06-05 06:56:28,502 INFO L226 Difference]: Without dead ends: 1953 [2021-06-05 06:56:28,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1261.2ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:56:28,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-05 06:56:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1791. [2021-06-05 06:56:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.3843575418994414) internal successors, (6058), 1790 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6058 transitions. [2021-06-05 06:56:28,537 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6058 transitions. Word has length 26 [2021-06-05 06:56:28,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:28,537 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6058 transitions. [2021-06-05 06:56:28,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6058 transitions. [2021-06-05 06:56:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:28,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:28,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:28,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2416,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:28,761 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash -992474305, now seen corresponding path program 35 times [2021-06-05 06:56:28,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:28,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689944402] [2021-06-05 06:56:28,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:28,979 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-06-05 06:56:29,098 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 06:56:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:29,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:29,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689944402] [2021-06-05 06:56:29,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689944402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:29,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792405566] [2021-06-05 06:56:29,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:29,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:56:29,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:29,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:56:29,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:29,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:56:29,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:29,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:56:29,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:56:29,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:29,735 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:29,741 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:29,747 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:56:29,754 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:56:29,761 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:56:29,767 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:56:29,773 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:29,780 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:29,786 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:56:29,793 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:56:29,799 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:29,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:29,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:56:29,804 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:29,872 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 06:56:29,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:56:29,873 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 06:56:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:29,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792405566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:29,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:29,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:56:29,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578740755] [2021-06-05 06:56:29,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:56:29,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:29,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:56:29,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:56:29,926 INFO L87 Difference]: Start difference. First operand 1791 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:30,402 INFO L93 Difference]: Finished difference Result 2115 states and 7050 transitions. [2021-06-05 06:56:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:56:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:30,406 INFO L225 Difference]: With dead ends: 2115 [2021-06-05 06:56:30,406 INFO L226 Difference]: Without dead ends: 2100 [2021-06-05 06:56:30,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 953.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:56:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-06-05 06:56:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1785. [2021-06-05 06:56:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.383968609865471) internal successors, (6037), 1784 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6037 transitions. [2021-06-05 06:56:30,428 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6037 transitions. Word has length 26 [2021-06-05 06:56:30,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:30,428 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6037 transitions. [2021-06-05 06:56:30,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6037 transitions. [2021-06-05 06:56:30,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:30,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:30,430 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:30,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2421,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:30,631 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:30,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1234976963, now seen corresponding path program 36 times [2021-06-05 06:56:30,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:30,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214954100] [2021-06-05 06:56:30,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:31,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:31,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214954100] [2021-06-05 06:56:31,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214954100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:31,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851181441] [2021-06-05 06:56:31,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:31,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:56:31,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:31,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:56:31,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:31,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:31,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:56:31,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,485 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:31,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:56:31,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,495 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:31,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:56:31,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,506 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:31,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:31,507 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,517 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:31,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:31,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,531 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:56:31,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 06:56:31,532 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:31,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:56:31,548 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,559 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:31,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:31,560 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:31,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:56:31,575 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,586 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:31,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:56:31,587 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,598 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:31,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:56:31,599 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:31,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:56:31,613 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,623 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:31,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:56:31,624 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,634 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:31,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:31,635 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,644 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:31,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:56:31,645 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:31,656 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:31,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:56:31,657 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,790 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-05 06:56:31,790 INFO L628 ElimStorePlain]: treesize reduction 92, result has 50.8 percent of original size [2021-06-05 06:56:31,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:56:31,793 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-06-05 06:56:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:31,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851181441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:31,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:31,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:56:31,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414859799] [2021-06-05 06:56:31,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:56:31,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:31,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:56:31,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:56:31,938 INFO L87 Difference]: Start difference. First operand 1785 states and 6037 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:32,199 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 06:56:32,532 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 06:56:33,041 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 06:56:33,219 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-06-05 06:56:33,567 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-05 06:56:33,684 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-06-05 06:56:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:33,737 INFO L93 Difference]: Finished difference Result 2622 states and 8655 transitions. [2021-06-05 06:56:33,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:56:33,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:33,742 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 06:56:33,742 INFO L226 Difference]: Without dead ends: 2607 [2021-06-05 06:56:33,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2094.2ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:56:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-06-05 06:56:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1782. [2021-06-05 06:56:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-06-05 06:56:33,767 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-06-05 06:56:33,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:33,767 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-06-05 06:56:33,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-06-05 06:56:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:33,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:33,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:33,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:33,981 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash 649627467, now seen corresponding path program 37 times [2021-06-05 06:56:33,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:33,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625563509] [2021-06-05 06:56:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:34,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:34,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625563509] [2021-06-05 06:56:34,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625563509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:34,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883173042] [2021-06-05 06:56:34,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:56:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:34,798 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 06:56:34,873 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:34,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2021-06-05 06:56:34,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:35,038 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 06:56:35,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:35,058 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:35,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 49 [2021-06-05 06:56:35,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:35,215 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 06:56:35,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:35,233 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:35,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 54 [2021-06-05 06:56:35,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:35,385 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 06:56:35,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:35,406 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:35,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 60 [2021-06-05 06:56:35,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:35,550 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 06:56:35,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:35,569 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:35,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 55 [2021-06-05 06:56:35,572 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:35,709 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 06:56:35,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:35,741 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:35,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 50 [2021-06-05 06:56:35,744 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:35,871 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:56:35,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:35,885 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:35,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 49 [2021-06-05 06:56:35,887 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:36,008 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 06:56:36,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:36,023 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:36,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 63 [2021-06-05 06:56:36,025 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:36,141 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 06:56:36,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:36,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:56:36,149 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:665, output treesize:244 [2021-06-05 06:56:36,310 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 06:56:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:36,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883173042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:36,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:36,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:56:36,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672254669] [2021-06-05 06:56:36,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:56:36,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:56:36,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:56:36,394 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:36,920 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-06-05 06:56:37,367 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 06:56:37,740 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 06:56:38,216 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2021-06-05 06:56:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:38,390 INFO L93 Difference]: Finished difference Result 2302 states and 7609 transitions. [2021-06-05 06:56:38,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:56:38,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:38,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:38,393 INFO L225 Difference]: With dead ends: 2302 [2021-06-05 06:56:38,394 INFO L226 Difference]: Without dead ends: 2287 [2021-06-05 06:56:38,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2538.8ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:56:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-06-05 06:56:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1774. [2021-06-05 06:56:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.3756345177664975) internal successors, (5985), 1773 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 5985 transitions. [2021-06-05 06:56:38,415 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 5985 transitions. Word has length 26 [2021-06-05 06:56:38,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:38,415 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 5985 transitions. [2021-06-05 06:56:38,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 5985 transitions. [2021-06-05 06:56:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:38,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:38,418 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:38,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2486 [2021-06-05 06:56:38,640 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:38,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:38,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1956490383, now seen corresponding path program 38 times [2021-06-05 06:56:38,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:38,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304819125] [2021-06-05 06:56:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:39,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:39,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304819125] [2021-06-05 06:56:39,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304819125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:39,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165502580] [2021-06-05 06:56:39,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:39,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:56:39,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:39,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:56:39,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,277 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:56:39,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:56:39,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:39,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:56:39,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,312 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:39,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:39,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:39,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:56:39,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,347 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:39,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:56:39,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:39,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:56:39,367 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:39,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:56:39,384 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,395 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:39,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:56:39,395 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,404 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:39,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:39,405 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,414 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:39,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:39,415 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,424 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:39,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:56:39,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,435 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:39,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:56:39,436 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,445 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:39,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:56:39,446 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,455 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:39,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:56:39,456 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,464 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:39,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:39,465 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:39,471 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:39,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:56:39,472 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,584 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-06-05 06:56:39,585 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-05 06:56:39,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:56:39,586 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 06:56:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:39,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165502580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:39,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:39,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:56:39,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623858552] [2021-06-05 06:56:39,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:56:39,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:39,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:56:39,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:56:39,743 INFO L87 Difference]: Start difference. First operand 1774 states and 5985 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:40,438 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 06:56:40,640 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 06:56:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:40,933 INFO L93 Difference]: Finished difference Result 2052 states and 6733 transitions. [2021-06-05 06:56:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:56:40,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:40,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:40,936 INFO L225 Difference]: With dead ends: 2052 [2021-06-05 06:56:40,936 INFO L226 Difference]: Without dead ends: 2031 [2021-06-05 06:56:40,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1407.9ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:56:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-06-05 06:56:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1745. [2021-06-05 06:56:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 3.371559633027523) internal successors, (5880), 1744 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 5880 transitions. [2021-06-05 06:56:40,963 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 5880 transitions. Word has length 26 [2021-06-05 06:56:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:40,963 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 5880 transitions. [2021-06-05 06:56:40,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 5880 transitions. [2021-06-05 06:56:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:40,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:40,966 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:41,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2499 [2021-06-05 06:56:41,167 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:41,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:41,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1231193713, now seen corresponding path program 39 times [2021-06-05 06:56:41,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:41,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142399763] [2021-06-05 06:56:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:41,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:41,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142399763] [2021-06-05 06:56:41,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142399763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:41,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704982390] [2021-06-05 06:56:41,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:41,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:56:41,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:41,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:56:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:41,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:41,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:56:41,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,998 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:41,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:56:41,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:42,160 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 06:56:42,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:42,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:42,184 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:56:42,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:56:42,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:42,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:42,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 06:56:42,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:42,360 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 06:56:42,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:42,386 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:56:42,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 06:56:42,387 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:42,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:42,405 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:56:42,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 23 [2021-06-05 06:56:42,407 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:42,553 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 06:56:42,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:42,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:42,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:42,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 06:56:42,575 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:42,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:42,593 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:56:42,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 06:56:42,594 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:42,860 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 06:56:42,861 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.9 percent of original size [2021-06-05 06:56:42,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 06:56:42,883 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:401, output treesize:330 [2021-06-05 06:56:43,069 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 06:56:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:43,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704982390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:43,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:43,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:56:43,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39354376] [2021-06-05 06:56:43,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:56:43,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:43,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:56:43,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:56:43,153 INFO L87 Difference]: Start difference. First operand 1745 states and 5880 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:44,038 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 06:56:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:44,266 INFO L93 Difference]: Finished difference Result 1970 states and 6526 transitions. [2021-06-05 06:56:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:56:44,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:44,269 INFO L225 Difference]: With dead ends: 1970 [2021-06-05 06:56:44,269 INFO L226 Difference]: Without dead ends: 1945 [2021-06-05 06:56:44,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1496.5ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:56:44,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-05 06:56:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1724. [2021-06-05 06:56:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.3743470690655832) internal successors, (5814), 1723 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5814 transitions. [2021-06-05 06:56:44,291 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5814 transitions. Word has length 26 [2021-06-05 06:56:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:44,291 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 5814 transitions. [2021-06-05 06:56:44,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5814 transitions. [2021-06-05 06:56:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:44,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:44,293 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:44,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2511 [2021-06-05 06:56:44,493 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:44,494 INFO L82 PathProgramCache]: Analyzing trace with hash 912205891, now seen corresponding path program 40 times [2021-06-05 06:56:44,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:44,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750678158] [2021-06-05 06:56:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:44,837 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 06:56:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:44,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:44,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750678158] [2021-06-05 06:56:44,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750678158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:44,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643174503] [2021-06-05 06:56:44,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:45,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:56:45,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:45,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:56:45,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:45,422 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 06:56:45,500 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:45,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 52 [2021-06-05 06:56:45,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:45,671 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 06:56:45,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:45,690 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:45,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 46 [2021-06-05 06:56:45,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:45,850 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 06:56:45,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:45,869 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:45,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 50 [2021-06-05 06:56:45,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:46,028 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 06:56:46,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:46,044 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:46,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 48 [2021-06-05 06:56:46,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:46,193 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-05 06:56:46,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:46,209 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:46,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 06:56:46,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:46,348 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 06:56:46,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:46,367 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:46,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-06-05 06:56:46,368 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:46,499 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:56:46,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:46,518 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:46,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 47 [2021-06-05 06:56:46,521 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:46,778 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2021-06-05 06:56:46,778 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.5 percent of original size [2021-06-05 06:56:46,794 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:46,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-06-05 06:56:46,796 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:46,909 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 06:56:46,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:46,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:56:46,917 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:641, output treesize:216 [2021-06-05 06:56:47,073 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-06-05 06:56:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:47,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643174503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:47,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:47,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:56:47,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274757724] [2021-06-05 06:56:47,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:56:47,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:47,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:56:47,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:56:47,159 INFO L87 Difference]: Start difference. First operand 1724 states and 5814 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:47,686 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 06:56:48,125 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 06:56:48,606 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 132 [2021-06-05 06:56:48,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:48,809 INFO L93 Difference]: Finished difference Result 2315 states and 7617 transitions. [2021-06-05 06:56:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:56:48,809 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:48,812 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 06:56:48,812 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 06:56:48,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2156.3ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:56:48,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 06:56:48,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1717. [2021-06-05 06:56:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.374708624708625) internal successors, (5791), 1716 states have internal predecessors, (5791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 5791 transitions. [2021-06-05 06:56:48,834 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 5791 transitions. Word has length 26 [2021-06-05 06:56:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:48,834 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 5791 transitions. [2021-06-05 06:56:48,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:48,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 5791 transitions. [2021-06-05 06:56:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:48,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:48,836 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:49,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-06-05 06:56:49,036 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:49,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:49,036 INFO L82 PathProgramCache]: Analyzing trace with hash -2073779469, now seen corresponding path program 41 times [2021-06-05 06:56:49,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:49,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781170899] [2021-06-05 06:56:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:49,310 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-06-05 06:56:49,461 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 06:56:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:49,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:49,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781170899] [2021-06-05 06:56:49,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781170899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:49,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726185187] [2021-06-05 06:56:49,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:49,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:56:49,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:49,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:56:49,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:50,160 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 06:56:50,455 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 68 [2021-06-05 06:56:50,523 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_342, v_prenex_343, v_prenex_344], 3=[A]} [2021-06-05 06:56:50,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:50,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:50,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:50,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:56:50,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:50,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:50,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:50,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:56:50,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:50,707 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 06:56:50,708 INFO L628 ElimStorePlain]: treesize reduction 53, result has 81.4 percent of original size [2021-06-05 06:56:50,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:50,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:50,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:50,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:50,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:50,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:50,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:50,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:56:50,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:50,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:50,860 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:50,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-06-05 06:56:50,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:50,872 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 06:56:50,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 52 [2021-06-05 06:56:50,874 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:50,953 INFO L628 ElimStorePlain]: treesize reduction 19, result has 81.4 percent of original size [2021-06-05 06:56:50,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:56:50,956 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:333, output treesize:59 [2021-06-05 06:56:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:51,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726185187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:51,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:51,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:56:51,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730975953] [2021-06-05 06:56:51,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:56:51,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:51,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:56:51,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:56:51,032 INFO L87 Difference]: Start difference. First operand 1717 states and 5791 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:51,973 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 06:56:52,506 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 06:56:52,812 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 84 [2021-06-05 06:56:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:53,001 INFO L93 Difference]: Finished difference Result 2241 states and 7399 transitions. [2021-06-05 06:56:53,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:56:53,002 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:53,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:53,005 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 06:56:53,005 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 06:56:53,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2629.3ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:56:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 06:56:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1703. [2021-06-05 06:56:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.375440658049354) internal successors, (5745), 1702 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5745 transitions. [2021-06-05 06:56:53,028 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5745 transitions. Word has length 26 [2021-06-05 06:56:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:53,028 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5745 transitions. [2021-06-05 06:56:53,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5745 transitions. [2021-06-05 06:56:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:53,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:53,030 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:53,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:53,231 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:53,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1720331193, now seen corresponding path program 42 times [2021-06-05 06:56:53,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:53,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008532200] [2021-06-05 06:56:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:53,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:53,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008532200] [2021-06-05 06:56:53,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008532200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:53,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276848764] [2021-06-05 06:56:53,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:53,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:56:53,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:56:53,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:53,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:53,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:56:53,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,002 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 1 [2021-06-05 06:56:54,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,025 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:56:54,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:56:54,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,040 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:56:54,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,053 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:56:54,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,064 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:56:54,065 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,075 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:54,076 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,087 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:54,088 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,098 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:54,099 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,121 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:56:54,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:56:54,123 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,134 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:56:54,135 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,145 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:54,146 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,156 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:56:54,158 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,168 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:56:54,169 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,189 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:56:54,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 06:56:54,190 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,197 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:56:54,198 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,393 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 06:56:54,394 INFO L628 ElimStorePlain]: treesize reduction 32, result has 81.3 percent of original size [2021-06-05 06:56:54,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:56:54,400 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:157 [2021-06-05 06:56:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:54,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276848764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:54,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:54,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:56:54,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696668503] [2021-06-05 06:56:54,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:56:54,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:54,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:56:54,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:56:54,568 INFO L87 Difference]: Start difference. First operand 1703 states and 5745 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:55,333 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 06:56:55,619 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 06:56:56,121 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-06-05 06:56:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:56,192 INFO L93 Difference]: Finished difference Result 2062 states and 6748 transitions. [2021-06-05 06:56:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:56:56,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:56,195 INFO L225 Difference]: With dead ends: 2062 [2021-06-05 06:56:56,195 INFO L226 Difference]: Without dead ends: 2032 [2021-06-05 06:56:56,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1769.9ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:56:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-06-05 06:56:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1752. [2021-06-05 06:56:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.371216447744146) internal successors, (5903), 1751 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5903 transitions. [2021-06-05 06:56:56,215 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5903 transitions. Word has length 26 [2021-06-05 06:56:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:56,215 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5903 transitions. [2021-06-05 06:56:56,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5903 transitions. [2021-06-05 06:56:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:56,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:56,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:56,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2590 [2021-06-05 06:56:56,417 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:56,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:56,418 INFO L82 PathProgramCache]: Analyzing trace with hash 339310983, now seen corresponding path program 43 times [2021-06-05 06:56:56,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:56,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715620601] [2021-06-05 06:56:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:56,853 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-06-05 06:56:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:57,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:57,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715620601] [2021-06-05 06:56:57,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715620601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:57,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684500269] [2021-06-05 06:56:57,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:57,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:56:57,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,421 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:56:57,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 06:56:57,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,432 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:57,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,444 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:56:57,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:57,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:56:57,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:57,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:56:57,476 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:57,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:56:57,491 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,502 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:57,503 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,513 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:57,514 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,525 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:56:57,526 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,536 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:56:57,537 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,549 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:56:57,550 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,561 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:56:57,562 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,573 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:57,574 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,584 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2021-06-05 06:56:57,585 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,595 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:56:57,596 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:57,603 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:57,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:56:57,603 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,740 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-06-05 06:56:57,741 INFO L628 ElimStorePlain]: treesize reduction 60, result has 61.3 percent of original size [2021-06-05 06:56:57,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:56:57,744 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-06-05 06:56:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:57,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684500269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:57,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:57,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:56:57,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876553213] [2021-06-05 06:56:57,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:56:57,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:57,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:56:57,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:56:57,881 INFO L87 Difference]: Start difference. First operand 1752 states and 5903 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:58,171 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 06:56:58,571 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 06:56:58,871 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 06:56:58,991 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-06-05 06:56:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:59,068 INFO L93 Difference]: Finished difference Result 2448 states and 8060 transitions. [2021-06-05 06:56:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:56:59,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:59,072 INFO L225 Difference]: With dead ends: 2448 [2021-06-05 06:56:59,072 INFO L226 Difference]: Without dead ends: 2433 [2021-06-05 06:56:59,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1682.1ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:56:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-06-05 06:56:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1749. [2021-06-05 06:56:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.372425629290618) internal successors, (5895), 1748 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5895 transitions. [2021-06-05 06:56:59,095 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5895 transitions. Word has length 26 [2021-06-05 06:56:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:59,095 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 5895 transitions. [2021-06-05 06:56:59,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5895 transitions. [2021-06-05 06:56:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:59,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:59,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:59,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2632 [2021-06-05 06:56:59,298 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:59,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1589366837, now seen corresponding path program 44 times [2021-06-05 06:56:59,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:59,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295507095] [2021-06-05 06:56:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:59,683 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-06-05 06:56:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:59,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:59,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295507095] [2021-06-05 06:56:59,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295507095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:59,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415134896] [2021-06-05 06:56:59,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:59,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:56:59,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:59,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:56:59,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:00,303 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:00,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 53 [2021-06-05 06:57:00,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:00,484 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 06:57:00,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:00,515 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:00,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2021-06-05 06:57:00,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:00,859 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 159 [2021-06-05 06:57:00,860 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-06-05 06:57:00,886 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:00,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-06-05 06:57:00,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:01,064 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 06:57:01,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:01,090 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:01,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-06-05 06:57:01,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:01,265 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 06:57:01,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:01,290 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:01,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-06-05 06:57:01,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:01,465 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 06:57:01,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:01,486 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:57:01,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 49 [2021-06-05 06:57:01,487 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:01,654 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 06:57:01,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:01,675 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:57:01,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 39 [2021-06-05 06:57:01,677 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:01,839 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 06:57:01,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:01,886 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:01,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-06-05 06:57:01,891 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:02,054 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 06:57:02,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:02,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:57:02,082 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:625, output treesize:405 [2021-06-05 06:57:02,286 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-05 06:57:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:02,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415134896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:02,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:02,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:57:02,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80674422] [2021-06-05 06:57:02,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:57:02,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:57:02,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:57:02,369 INFO L87 Difference]: Start difference. First operand 1749 states and 5895 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:02,778 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-05 06:57:02,981 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-06-05 06:57:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:03,364 INFO L93 Difference]: Finished difference Result 2259 states and 7490 transitions. [2021-06-05 06:57:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:57:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:03,368 INFO L225 Difference]: With dead ends: 2259 [2021-06-05 06:57:03,368 INFO L226 Difference]: Without dead ends: 2244 [2021-06-05 06:57:03,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1691.5ms TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:57:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-05 06:57:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1752. [2021-06-05 06:57:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.3757852655625356) internal successors, (5911), 1751 states have internal predecessors, (5911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5911 transitions. [2021-06-05 06:57:03,390 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5911 transitions. Word has length 26 [2021-06-05 06:57:03,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:03,390 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5911 transitions. [2021-06-05 06:57:03,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5911 transitions. [2021-06-05 06:57:03,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:03,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:03,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:03,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2665,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:03,593 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:03,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:03,593 INFO L82 PathProgramCache]: Analyzing trace with hash 755189195, now seen corresponding path program 45 times [2021-06-05 06:57:03,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:03,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109271465] [2021-06-05 06:57:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:03,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:03,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109271465] [2021-06-05 06:57:03,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109271465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:03,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115283991] [2021-06-05 06:57:03,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:04,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:57:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:57:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:04,547 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:04,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-06-05 06:57:04,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,042 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 184 [2021-06-05 06:57:05,043 INFO L628 ElimStorePlain]: treesize reduction 60, result has 91.1 percent of original size [2021-06-05 06:57:05,071 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:57:05,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2021-06-05 06:57:05,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,306 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2021-06-05 06:57:05,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:05,333 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:05,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-06-05 06:57:05,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,564 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 06:57:05,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:05,592 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:05,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-06-05 06:57:05,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:06,058 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 161 [2021-06-05 06:57:06,058 INFO L628 ElimStorePlain]: treesize reduction 13, result has 97.7 percent of original size [2021-06-05 06:57:06,088 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:06,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 06:57:06,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:06,515 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2021-06-05 06:57:06,516 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-06-05 06:57:06,543 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:06,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 51 [2021-06-05 06:57:06,546 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:06,968 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2021-06-05 06:57:06,969 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.2 percent of original size [2021-06-05 06:57:06,994 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:06,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-06-05 06:57:06,998 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:07,195 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:57:07,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:07,217 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:57:07,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 47 [2021-06-05 06:57:07,218 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:07,403 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 06:57:07,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:07,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:57:07,451 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:673, output treesize:432 [2021-06-05 06:57:07,718 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-05 06:57:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:07,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115283991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:07,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:07,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:57:07,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543250698] [2021-06-05 06:57:07,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:07,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:07,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:07,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:07,810 INFO L87 Difference]: Start difference. First operand 1752 states and 5911 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:08,109 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-06-05 06:57:08,343 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 06:57:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:08,883 INFO L93 Difference]: Finished difference Result 2323 states and 7689 transitions. [2021-06-05 06:57:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:57:08,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:08,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:08,886 INFO L225 Difference]: With dead ends: 2323 [2021-06-05 06:57:08,887 INFO L226 Difference]: Without dead ends: 2308 [2021-06-05 06:57:08,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1625.0ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-06-05 06:57:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1770. [2021-06-05 06:57:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.3719615602035047) internal successors, (5965), 1769 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 5965 transitions. [2021-06-05 06:57:08,908 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 5965 transitions. Word has length 26 [2021-06-05 06:57:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:08,908 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 5965 transitions. [2021-06-05 06:57:08,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 5965 transitions. [2021-06-05 06:57:08,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:08,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:08,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:09,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-06-05 06:57:09,111 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:09,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1554530479, now seen corresponding path program 46 times [2021-06-05 06:57:09,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:09,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485359766] [2021-06-05 06:57:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:09,603 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-05 06:57:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:09,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:09,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485359766] [2021-06-05 06:57:09,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485359766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:09,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640206202] [2021-06-05 06:57:09,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:09,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:09,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:09,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:10,255 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 06:57:10,497 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 65 [2021-06-05 06:57:10,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:10,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:10,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:10,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:57:10,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:10,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:10,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:10,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:57:10,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:10,706 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 06:57:10,706 INFO L628 ElimStorePlain]: treesize reduction 73, result has 65.9 percent of original size [2021-06-05 06:57:10,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:10,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:10,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:57:10,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:10,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:10,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:10,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:10,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:57:10,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:10,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:10,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:10,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:57:10,814 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:10,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:10,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:57:10,855 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:61 [2021-06-05 06:57:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:10,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640206202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:10,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:10,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:57:10,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623844460] [2021-06-05 06:57:10,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:10,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:10,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:10,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:10,958 INFO L87 Difference]: Start difference. First operand 1770 states and 5965 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:11,253 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-05 06:57:11,907 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:57:12,183 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-06-05 06:57:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:12,311 INFO L93 Difference]: Finished difference Result 2217 states and 7354 transitions. [2021-06-05 06:57:12,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:57:12,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:12,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:12,315 INFO L225 Difference]: With dead ends: 2217 [2021-06-05 06:57:12,315 INFO L226 Difference]: Without dead ends: 2202 [2021-06-05 06:57:12,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2153.4ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:57:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-05 06:57:12,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1791. [2021-06-05 06:57:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.368715083798883) internal successors, (6030), 1790 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6030 transitions. [2021-06-05 06:57:12,342 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6030 transitions. Word has length 26 [2021-06-05 06:57:12,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:12,342 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6030 transitions. [2021-06-05 06:57:12,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:12,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6030 transitions. [2021-06-05 06:57:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:12,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:12,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:12,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2734,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:12,545 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash -63002301, now seen corresponding path program 47 times [2021-06-05 06:57:12,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:12,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268096500] [2021-06-05 06:57:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:12,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:12,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268096500] [2021-06-05 06:57:12,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268096500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:12,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870848547] [2021-06-05 06:57:12,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:12,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:57:12,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:12,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:57:12,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:13,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,244 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:13,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:57:13,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:13,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:57:13,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,269 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:13,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:13,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:13,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:57:13,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:13,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:57:13,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:13,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:57:13,310 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:13,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:57:13,325 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,337 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:13,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:57:13,337 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,347 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:13,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:57:13,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,358 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:13,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:13,359 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,369 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:13,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:57:13,370 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:13,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:57:13,381 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,391 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:13,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:57:13,392 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,402 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:13,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:57:13,402 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,412 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:13,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:57:13,413 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:13,420 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:13,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:57:13,421 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:13,543 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-06-05 06:57:13,544 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-05 06:57:13,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:57:13,545 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 06:57:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:13,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870848547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:13,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:13,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:57:13,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615372662] [2021-06-05 06:57:13,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:57:13,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:13,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:57:13,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:57:13,689 INFO L87 Difference]: Start difference. First operand 1791 states and 6030 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:14,097 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 06:57:14,620 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-05 06:57:14,775 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 06:57:15,038 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 06:57:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:15,393 INFO L93 Difference]: Finished difference Result 2500 states and 8240 transitions. [2021-06-05 06:57:15,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:57:15,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:15,396 INFO L225 Difference]: With dead ends: 2500 [2021-06-05 06:57:15,396 INFO L226 Difference]: Without dead ends: 2485 [2021-06-05 06:57:15,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1913.7ms TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:57:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-05 06:57:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 1788. [2021-06-05 06:57:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.369893676552882) internal successors, (6022), 1787 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6022 transitions. [2021-06-05 06:57:15,419 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6022 transitions. Word has length 26 [2021-06-05 06:57:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:15,419 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6022 transitions. [2021-06-05 06:57:15,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6022 transitions. [2021-06-05 06:57:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:15,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:15,421 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:15,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2745 [2021-06-05 06:57:15,624 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:15,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:15,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1752945205, now seen corresponding path program 48 times [2021-06-05 06:57:15,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:15,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398071605] [2021-06-05 06:57:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:15,961 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-05 06:57:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:16,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:16,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398071605] [2021-06-05 06:57:16,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398071605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:16,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695746057] [2021-06-05 06:57:16,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:16,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:57:16,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:16,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:57:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:16,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:16,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 06:57:16,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,456 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:16,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-06-05 06:57:16,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:16,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-06-05 06:57:16,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,489 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:16,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-06-05 06:57:16,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,503 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:16,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:57:16,504 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,517 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:16,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 06:57:16,518 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,534 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:16,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 06:57:16,534 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,551 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:57:16,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:57:16,553 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,568 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:16,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:57:16,569 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,584 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:16,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 06:57:16,585 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,598 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:16,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 06:57:16,599 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,612 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:16,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:57:16,613 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:16,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-06-05 06:57:16,631 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,646 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:57:16,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2021-06-05 06:57:16,647 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,660 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:16,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:57:16,661 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:16,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:16,669 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:16,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:57:16,669 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,770 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-06-05 06:57:16,770 INFO L628 ElimStorePlain]: treesize reduction 49, result has 63.7 percent of original size [2021-06-05 06:57:16,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:57:16,771 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-06-05 06:57:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:16,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695746057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:16,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:16,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:57:16,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172551025] [2021-06-05 06:57:16,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:57:16,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:16,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:57:16,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:57:16,933 INFO L87 Difference]: Start difference. First operand 1788 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:17,793 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2021-06-05 06:57:17,951 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 06:57:18,130 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-05 06:57:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:18,274 INFO L93 Difference]: Finished difference Result 2414 states and 7934 transitions. [2021-06-05 06:57:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:57:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:18,278 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 06:57:18,278 INFO L226 Difference]: Without dead ends: 2368 [2021-06-05 06:57:18,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1618.1ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:57:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-05 06:57:18,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 1811. [2021-06-05 06:57:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-06-05 06:57:18,300 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-06-05 06:57:18,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:18,300 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-06-05 06:57:18,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-06-05 06:57:18,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:18,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:18,302 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:18,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2757,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:18,503 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:18,503 INFO L82 PathProgramCache]: Analyzing trace with hash 731595527, now seen corresponding path program 49 times [2021-06-05 06:57:18,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:18,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521599036] [2021-06-05 06:57:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:18,909 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-05 06:57:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:19,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:19,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521599036] [2021-06-05 06:57:19,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521599036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:19,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214271674] [2021-06-05 06:57:19,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:19,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:19,498 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_390, v_prenex_388, v_prenex_389], 3=[A]} [2021-06-05 06:57:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:19,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:19,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:57:19,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:19,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:19,529 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:19,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:57:19,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:19,701 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 06:57:19,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:19,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:19,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:57:19,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:19,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:19,731 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:19,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:57:19,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:19,865 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 06:57:19,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:19,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:19,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:19,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:57:19,881 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:19,893 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:57:19,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 06:57:19,894 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:20,135 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 06:57:20,135 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.0 percent of original size [2021-06-05 06:57:20,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:20,154 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:57:20,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 45 [2021-06-05 06:57:20,156 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:20,171 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:57:20,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 52 [2021-06-05 06:57:20,172 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:20,371 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 06:57:20,372 INFO L628 ElimStorePlain]: treesize reduction 32, result has 85.1 percent of original size [2021-06-05 06:57:20,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:57:20,378 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:442, output treesize:160 [2021-06-05 06:57:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:20,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214271674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:20,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:20,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:57:20,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100405388] [2021-06-05 06:57:20,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:20,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:20,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:20,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:20,578 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:21,323 INFO L93 Difference]: Finished difference Result 2322 states and 7708 transitions. [2021-06-05 06:57:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:57:21,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:21,326 INFO L225 Difference]: With dead ends: 2322 [2021-06-05 06:57:21,326 INFO L226 Difference]: Without dead ends: 2307 [2021-06-05 06:57:21,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1318.4ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-06-05 06:57:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1811. [2021-06-05 06:57:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-06-05 06:57:21,347 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-06-05 06:57:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:21,348 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-06-05 06:57:21,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-06-05 06:57:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:21,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:21,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:21,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2777 [2021-06-05 06:57:21,550 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash 396904007, now seen corresponding path program 55 times [2021-06-05 06:57:21,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:21,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019438186] [2021-06-05 06:57:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:22,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:22,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019438186] [2021-06-05 06:57:22,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019438186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:22,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538089482] [2021-06-05 06:57:22,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:22,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:22,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,477 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-06-05 06:57:22,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,505 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:57:22,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-06-05 06:57:22,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,525 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-06-05 06:57:22,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,545 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-06-05 06:57:22,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,564 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 06:57:22,565 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,582 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-06-05 06:57:22,584 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,603 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-06-05 06:57:22,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,622 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-06-05 06:57:22,623 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,641 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-06-05 06:57:22,642 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,661 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-06-05 06:57:22,662 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,679 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 06:57:22,680 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,699 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 06:57:22,700 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,728 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:57:22,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 55 [2021-06-05 06:57:22,730 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,752 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 06:57:22,753 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,771 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:22,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-06-05 06:57:22,773 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,780 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:22,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 44 [2021-06-05 06:57:22,782 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,826 INFO L628 ElimStorePlain]: treesize reduction 45, result has 47.7 percent of original size [2021-06-05 06:57:22,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:57:22,828 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-06-05 06:57:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:22,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538089482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:22,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:22,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 06:57:22,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884059466] [2021-06-05 06:57:22,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:22,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:22,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:22,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:22,865 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:23,587 INFO L93 Difference]: Finished difference Result 2373 states and 7573 transitions. [2021-06-05 06:57:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:57:23,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:23,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:23,590 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 06:57:23,590 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 06:57:23,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1024.9ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:57:23,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 06:57:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1833. [2021-06-05 06:57:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.3717248908296944) internal successors, (6177), 1832 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6177 transitions. [2021-06-05 06:57:23,613 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6177 transitions. Word has length 26 [2021-06-05 06:57:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:23,613 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6177 transitions. [2021-06-05 06:57:23,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6177 transitions. [2021-06-05 06:57:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:23,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:23,615 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:23,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2806 [2021-06-05 06:57:23,816 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:23,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1464778571, now seen corresponding path program 56 times [2021-06-05 06:57:23,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:23,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062327336] [2021-06-05 06:57:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:24,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:24,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062327336] [2021-06-05 06:57:24,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062327336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:24,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468999856] [2021-06-05 06:57:24,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:24,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:57:24,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:24,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:24,465 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 06:57:24,522 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_391, v_prenex_395], 5=[A, v_prenex_393]} [2021-06-05 06:57:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:24,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:24,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:24,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:24,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:57:24,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:24,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:24,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:24,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:24,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 12 [2021-06-05 06:57:24,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:24,675 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 06:57:24,676 INFO L628 ElimStorePlain]: treesize reduction 199, result has 46.8 percent of original size [2021-06-05 06:57:24,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:24,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:24,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:57:24,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:24,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:24,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:24,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:24,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:24,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:24,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 24 [2021-06-05 06:57:24,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:24,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:24,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:24,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:24,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:24,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:24,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 06:57:24,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:24,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:24,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:57:24,822 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:445, output treesize:55 [2021-06-05 06:57:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:24,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468999856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:24,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:24,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 06:57:24,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428635651] [2021-06-05 06:57:24,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:24,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:24,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:24,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:24,883 INFO L87 Difference]: Start difference. First operand 1833 states and 6177 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:25,645 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 06:57:25,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:25,766 INFO L93 Difference]: Finished difference Result 2211 states and 7333 transitions. [2021-06-05 06:57:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:57:25,766 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:25,769 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 06:57:25,769 INFO L226 Difference]: Without dead ends: 2180 [2021-06-05 06:57:25,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1050.3ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:57:25,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-06-05 06:57:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1833. [2021-06-05 06:57:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-06-05 06:57:25,789 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-06-05 06:57:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:25,790 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-06-05 06:57:25,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-06-05 06:57:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:25,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:25,792 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:25,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2864 [2021-06-05 06:57:25,992 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:25,993 INFO L82 PathProgramCache]: Analyzing trace with hash -192487861, now seen corresponding path program 57 times [2021-06-05 06:57:25,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:25,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612664223] [2021-06-05 06:57:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:26,296 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-05 06:57:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:26,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:26,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612664223] [2021-06-05 06:57:26,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612664223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:26,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035731206] [2021-06-05 06:57:26,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:26,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:57:26,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:26,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:26,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:26,889 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 06:57:27,186 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_408, v_prenex_409], 6=[v_prenex_404, v_prenex_405, A, v_prenex_407, v_prenex_411, v_prenex_413]} [2021-06-05 06:57:27,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:27,231 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:57:27,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 39 [2021-06-05 06:57:27,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:27,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:27,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:27,271 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:57:27,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 06:57:27,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:28,266 WARN L205 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 221 [2021-06-05 06:57:28,267 INFO L628 ElimStorePlain]: treesize reduction 38, result has 97.9 percent of original size [2021-06-05 06:57:28,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:28,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:28,316 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:57:28,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 06:57:28,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:28,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:28,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:28,349 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-05 06:57:28,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-05 06:57:28,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:28,857 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2021-06-05 06:57:28,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:28,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:28,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:28,913 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-05 06:57:28,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 85 [2021-06-05 06:57:28,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:28,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:28,952 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-06-05 06:57:28,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 70 [2021-06-05 06:57:28,954 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:29,397 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2021-06-05 06:57:29,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:29,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:29,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:29,438 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 06:57:29,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-06-05 06:57:29,441 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:29,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:29,457 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:29,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 06:57:29,457 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:29,827 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 06:57:29,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:29,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:29,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:29,867 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 06:57:29,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 84 [2021-06-05 06:57:29,873 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:29,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:29,900 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:57:29,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 65 [2021-06-05 06:57:29,901 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,587 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 154 [2021-06-05 06:57:30,588 INFO L628 ElimStorePlain]: treesize reduction 12, result has 98.9 percent of original size [2021-06-05 06:57:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,638 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-06-05 06:57:30,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 71 [2021-06-05 06:57:30,640 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,679 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:57:30,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 162 treesize of output 96 [2021-06-05 06:57:30,687 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:31,259 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 133 [2021-06-05 06:57:31,260 INFO L628 ElimStorePlain]: treesize reduction 34, result has 96.0 percent of original size [2021-06-05 06:57:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:31,296 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 06:57:31,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-06-05 06:57:31,299 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:31,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:31,311 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:31,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 06:57:31,312 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:31,527 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:57:31,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:31,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:31,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:31,562 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 06:57:31,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 78 [2021-06-05 06:57:31,567 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:31,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:31,592 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-06-05 06:57:31,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 167 treesize of output 87 [2021-06-05 06:57:31,597 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:31,939 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-05 06:57:31,939 INFO L628 ElimStorePlain]: treesize reduction 66, result has 83.2 percent of original size [2021-06-05 06:57:31,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-05 06:57:31,947 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1858, output treesize:310 [2021-06-05 06:57:32,114 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-06-05 06:57:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:32,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035731206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:32,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:32,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:57:32,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633568791] [2021-06-05 06:57:32,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:57:32,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:32,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:57:32,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:57:32,165 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:33,213 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 06:57:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:33,343 INFO L93 Difference]: Finished difference Result 2363 states and 7827 transitions. [2021-06-05 06:57:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:57:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:33,347 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 06:57:33,347 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 06:57:33,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1835.9ms TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:57:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 06:57:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1833. [2021-06-05 06:57:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-06-05 06:57:33,370 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-06-05 06:57:33,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:33,370 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-06-05 06:57:33,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-06-05 06:57:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:33,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:33,372 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:33,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2878,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:33,572 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:33,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1845763381, now seen corresponding path program 50 times [2021-06-05 06:57:33,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:33,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187871923] [2021-06-05 06:57:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:34,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:34,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187871923] [2021-06-05 06:57:34,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187871923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:34,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855723267] [2021-06-05 06:57:34,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:34,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:57:34,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:34,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:57:34,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:34,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,360 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:34,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:57:34,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:34,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:57:34,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,386 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:34,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:34,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:34,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:57:34,401 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,411 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:34,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:57:34,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:34,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:57:34,426 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:34,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:57:34,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,451 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:34,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:57:34,452 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,477 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:34,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:57:34,478 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,488 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:34,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:34,488 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,497 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:34,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:57:34,499 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,508 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:34,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:57:34,509 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,519 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:34,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:57:34,520 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,529 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:34,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:57:34,530 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,538 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:34,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:57:34,539 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,545 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:34,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:57:34,546 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,659 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-06-05 06:57:34,659 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-05 06:57:34,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:57:34,660 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 06:57:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:34,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855723267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:34,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:34,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:57:34,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646282159] [2021-06-05 06:57:34,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:57:34,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:34,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:57:34,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:57:34,789 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:35,231 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-05 06:57:35,964 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-06-05 06:57:36,223 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 06:57:36,457 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 06:57:36,660 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-05 06:57:36,964 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2021-06-05 06:57:37,151 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-05 06:57:37,600 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 06:57:37,911 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-05 06:57:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:37,986 INFO L93 Difference]: Finished difference Result 2484 states and 8143 transitions. [2021-06-05 06:57:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:57:37,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:37,990 INFO L225 Difference]: With dead ends: 2484 [2021-06-05 06:57:37,990 INFO L226 Difference]: Without dead ends: 2469 [2021-06-05 06:57:37,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3039.3ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:57:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-06-05 06:57:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1840. [2021-06-05 06:57:38,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.368678629690049) internal successors, (6195), 1839 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6195 transitions. [2021-06-05 06:57:38,014 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6195 transitions. Word has length 26 [2021-06-05 06:57:38,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:38,014 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6195 transitions. [2021-06-05 06:57:38,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:38,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6195 transitions. [2021-06-05 06:57:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:38,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:38,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:38,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2941 [2021-06-05 06:57:38,216 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash -295381817, now seen corresponding path program 58 times [2021-06-05 06:57:38,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:38,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058664074] [2021-06-05 06:57:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:38,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:38,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058664074] [2021-06-05 06:57:38,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058664074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:38,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095300100] [2021-06-05 06:57:38,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:38,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:38,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:38,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:57:38,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:39,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 06:57:39,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 06:57:39,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 06:57:39,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 06:57:39,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:57:39,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:57:39,197 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:57:39,206 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:57:39,215 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 06:57:39,225 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:57:39,234 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:57:39,244 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 06:57:39,253 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 06:57:39,261 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 06:57:39,270 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 06:57:39,279 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:39,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:39,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:57:39,284 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,309 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-06-05 06:57:39,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,310 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-06-05 06:57:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:39,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095300100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:39,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:39,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:57:39,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184706185] [2021-06-05 06:57:39,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:57:39,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:39,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:57:39,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:57:39,337 INFO L87 Difference]: Start difference. First operand 1840 states and 6195 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:40,259 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 06:57:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:41,105 INFO L93 Difference]: Finished difference Result 2777 states and 8773 transitions. [2021-06-05 06:57:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:57:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:41,109 INFO L225 Difference]: With dead ends: 2777 [2021-06-05 06:57:41,109 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 06:57:41,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1653.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:57:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 06:57:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1885. [2021-06-05 06:57:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.379511677282378) internal successors, (6367), 1884 states have internal predecessors, (6367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6367 transitions. [2021-06-05 06:57:41,135 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6367 transitions. Word has length 26 [2021-06-05 06:57:41,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:41,135 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6367 transitions. [2021-06-05 06:57:41,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6367 transitions. [2021-06-05 06:57:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:41,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:41,137 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:41,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2953,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:41,338 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:41,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:41,338 INFO L82 PathProgramCache]: Analyzing trace with hash -69388293, now seen corresponding path program 59 times [2021-06-05 06:57:41,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:41,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874010264] [2021-06-05 06:57:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:41,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:41,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874010264] [2021-06-05 06:57:41,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874010264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:41,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657350729] [2021-06-05 06:57:41,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:41,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:57:41,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:41,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:41,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:42,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 06:57:42,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 06:57:42,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 06:57:42,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 06:57:42,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:57:42,220 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 06:57:42,231 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:57:42,242 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 06:57:42,253 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 06:57:42,265 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 06:57:42,276 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:57:42,287 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 06:57:42,299 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 06:57:42,310 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 06:57:42,321 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 06:57:42,332 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:42,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:42,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:57:42,339 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:42,420 INFO L628 ElimStorePlain]: treesize reduction 345, result has 12.0 percent of original size [2021-06-05 06:57:42,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:57:42,422 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:41 [2021-06-05 06:57:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:42,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657350729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:42,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:42,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:57:42,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219359622] [2021-06-05 06:57:42,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:42,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:42,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:42,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:42,464 INFO L87 Difference]: Start difference. First operand 1885 states and 6367 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:43,407 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 06:57:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:43,886 INFO L93 Difference]: Finished difference Result 3099 states and 9931 transitions. [2021-06-05 06:57:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:57:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:43,891 INFO L225 Difference]: With dead ends: 3099 [2021-06-05 06:57:43,891 INFO L226 Difference]: Without dead ends: 3069 [2021-06-05 06:57:43,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1414.5ms TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:57:43,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-06-05 06:57:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1905. [2021-06-05 06:57:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 3.3891806722689077) internal successors, (6453), 1904 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 6453 transitions. [2021-06-05 06:57:43,922 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 6453 transitions. Word has length 26 [2021-06-05 06:57:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:43,922 INFO L482 AbstractCegarLoop]: Abstraction has 1905 states and 6453 transitions. [2021-06-05 06:57:43,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 6453 transitions. [2021-06-05 06:57:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:43,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:43,924 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:44,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:44,125 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1764260359, now seen corresponding path program 60 times [2021-06-05 06:57:44,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:44,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67227951] [2021-06-05 06:57:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:44,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:44,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67227951] [2021-06-05 06:57:44,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67227951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:44,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161893638] [2021-06-05 06:57:44,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:44,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:57:44,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:44,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:57:44,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:44,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,707 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 06:57:44,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2021-06-05 06:57:44,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:44,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:44,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 06:57:44,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:44,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,779 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 06:57:44,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2021-06-05 06:57:44,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:44,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,829 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 06:57:44,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-06-05 06:57:44,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:44,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,869 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 06:57:44,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 06:57:44,873 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:44,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,897 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:44,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 06:57:44,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:44,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,947 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-05 06:57:44,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 46 [2021-06-05 06:57:44,951 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:44,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,973 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:44,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:57:44,976 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:44,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:44,998 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:44,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:57:45,000 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,024 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:45,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:57:45,025 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,047 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:45,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:57:45,049 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,074 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:45,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 06:57:45,075 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,098 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:45,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:57:45,099 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,122 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:45,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 06:57:45,123 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,144 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:45,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:57:45,145 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,172 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-05 06:57:45,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 35 [2021-06-05 06:57:45,173 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,287 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-06-05 06:57:45,287 INFO L628 ElimStorePlain]: treesize reduction 130, result has 35.0 percent of original size [2021-06-05 06:57:45,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:57:45,289 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:70 [2021-06-05 06:57:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:45,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161893638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:45,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:45,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:57:45,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270297187] [2021-06-05 06:57:45,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:57:45,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:45,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:57:45,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:57:45,443 INFO L87 Difference]: Start difference. First operand 1905 states and 6453 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:46,089 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 06:57:47,027 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 06:57:47,187 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 06:57:47,317 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 06:57:47,618 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 06:57:47,821 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 06:57:48,117 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 06:57:48,423 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 06:57:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:48,605 INFO L93 Difference]: Finished difference Result 2960 states and 9357 transitions. [2021-06-05 06:57:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:57:48,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:48,610 INFO L225 Difference]: With dead ends: 2960 [2021-06-05 06:57:48,610 INFO L226 Difference]: Without dead ends: 2916 [2021-06-05 06:57:48,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 3016.2ms TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:57:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2021-06-05 06:57:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 1933. [2021-06-05 06:57:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 3.391821946169772) internal successors, (6553), 1932 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 6553 transitions. [2021-06-05 06:57:48,637 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 6553 transitions. Word has length 26 [2021-06-05 06:57:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:48,638 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 6553 transitions. [2021-06-05 06:57:48,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 6553 transitions. [2021-06-05 06:57:48,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:48,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:48,640 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:48,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3157,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:48,840 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash -680204241, now seen corresponding path program 51 times [2021-06-05 06:57:48,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:48,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645326931] [2021-06-05 06:57:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:49,028 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-06-05 06:57:49,153 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 06:57:49,271 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 06:57:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:49,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:49,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645326931] [2021-06-05 06:57:49,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645326931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:49,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048979552] [2021-06-05 06:57:49,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:49,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:57:49,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:49,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:57:49,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:49,954 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 06:57:50,263 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 102 [2021-06-05 06:57:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:50,402 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 06:57:50,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:57:50,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:50,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:50,424 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:57:50,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 46 [2021-06-05 06:57:50,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:50,614 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2021-06-05 06:57:50,614 INFO L628 ElimStorePlain]: treesize reduction 291, result has 43.3 percent of original size [2021-06-05 06:57:50,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:50,626 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:57:50,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 06:57:50,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:50,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:50,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:50,715 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:57:50,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 06:57:50,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:50,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:50,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:50,795 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:57:50,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 06:57:50,797 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:50,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:50,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:50,860 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:57:50,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 06:57:50,862 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:50,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:50,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:57:50,913 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:627, output treesize:83 [2021-06-05 06:57:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:50,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048979552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:50,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:50,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:57:50,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116604367] [2021-06-05 06:57:50,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:57:50,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:50,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:57:50,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:57:50,994 INFO L87 Difference]: Start difference. First operand 1933 states and 6553 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:51,637 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 06:57:52,108 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 06:57:52,489 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 06:57:52,940 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 06:57:53,168 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 06:57:53,796 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 134 [2021-06-05 06:57:53,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:53,971 INFO L93 Difference]: Finished difference Result 2443 states and 8134 transitions. [2021-06-05 06:57:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:57:53,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:53,975 INFO L225 Difference]: With dead ends: 2443 [2021-06-05 06:57:53,975 INFO L226 Difference]: Without dead ends: 2428 [2021-06-05 06:57:53,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3375.1ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:57:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-05 06:57:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1948. [2021-06-05 06:57:53,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.389830508474576) internal successors, (6600), 1947 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6600 transitions. [2021-06-05 06:57:53,997 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6600 transitions. Word has length 26 [2021-06-05 06:57:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:53,997 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6600 transitions. [2021-06-05 06:57:53,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6600 transitions. [2021-06-05 06:57:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:53,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:53,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:54,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3186 [2021-06-05 06:57:54,200 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:54,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1997230275, now seen corresponding path program 52 times [2021-06-05 06:57:54,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:54,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000922068] [2021-06-05 06:57:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:54,470 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 06:57:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:54,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:54,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000922068] [2021-06-05 06:57:54,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000922068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:54,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920400248] [2021-06-05 06:57:54,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:54,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:54,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:54,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:54,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:55,192 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 06:57:55,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:57:55,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:55,410 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 06:57:55,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,426 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:55,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 06:57:55,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:55,570 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:57:55,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,585 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:55,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:57:55,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:55,722 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 06:57:55,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:57:55,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:55,873 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 06:57:55,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,887 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:55,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:57:55,889 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:56,019 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 06:57:56,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:56,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:56,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:56,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:57:56,035 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:56,159 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 06:57:56,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:56,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:56,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:57:56,174 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:56,306 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 06:57:56,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:56,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:56,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:56,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:57:56,319 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:56,434 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:57:56,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:56,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:57:56,442 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 06:57:56,594 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 06:57:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:56,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920400248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:56,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:56,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:57:56,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616890288] [2021-06-05 06:57:56,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:57:56,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:56,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:57:56,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:57:56,679 INFO L87 Difference]: Start difference. First operand 1948 states and 6600 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:57,045 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 06:57:57,330 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-06-05 06:57:57,729 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-05 06:57:57,872 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-05 06:57:58,003 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 06:57:58,187 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 06:57:58,552 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 06:57:58,969 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-06-05 06:57:59,281 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 06:57:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:59,522 INFO L93 Difference]: Finished difference Result 2746 states and 9083 transitions. [2021-06-05 06:57:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:57:59,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:59,528 INFO L225 Difference]: With dead ends: 2746 [2021-06-05 06:57:59,528 INFO L226 Difference]: Without dead ends: 2731 [2021-06-05 06:57:59,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 3143.6ms TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:57:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-06-05 06:57:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 1943. [2021-06-05 06:57:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 3.388774459320288) internal successors, (6581), 1942 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 6581 transitions. [2021-06-05 06:57:59,563 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 6581 transitions. Word has length 26 [2021-06-05 06:57:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:59,564 INFO L482 AbstractCegarLoop]: Abstraction has 1943 states and 6581 transitions. [2021-06-05 06:57:59,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:59,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 6581 transitions. [2021-06-05 06:57:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:59,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:59,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:59,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3205,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:59,790 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:59,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:59,790 INFO L82 PathProgramCache]: Analyzing trace with hash 307287371, now seen corresponding path program 53 times [2021-06-05 06:57:59,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:59,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914903600] [2021-06-05 06:57:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:00,165 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 06:58:00,368 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 06:58:00,541 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-06-05 06:58:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:00,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:00,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914903600] [2021-06-05 06:58:00,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914903600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:00,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225087148] [2021-06-05 06:58:00,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:00,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:58:00,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:01,206 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 06:58:01,306 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_446], 3=[v_prenex_445, v_prenex_447], 6=[A]} [2021-06-05 06:58:01,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:01,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:58:01,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:01,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:01,335 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:58:01,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 06:58:01,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:01,682 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-06-05 06:58:01,682 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.4 percent of original size [2021-06-05 06:58:01,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:01,701 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:58:01,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 42 [2021-06-05 06:58:01,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:01,719 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:58:01,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 49 [2021-06-05 06:58:01,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:02,036 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-06-05 06:58:02,037 INFO L628 ElimStorePlain]: treesize reduction 36, result has 91.4 percent of original size [2021-06-05 06:58:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:02,057 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:58:02,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:58:02,060 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:02,072 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:58:02,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-06-05 06:58:02,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:02,198 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 06:58:02,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:02,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:02,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:02,228 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-06-05 06:58:02,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 59 [2021-06-05 06:58:02,230 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:02,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:02,239 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 06:58:02,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 1 [2021-06-05 06:58:02,240 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:02,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:02,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:58:02,335 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:518, output treesize:190 [2021-06-05 06:58:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:02,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225087148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:02,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:02,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:58:02,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939087497] [2021-06-05 06:58:02,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:58:02,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:02,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:58:02,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:02,531 INFO L87 Difference]: Start difference. First operand 1943 states and 6581 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,944 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-06-05 06:58:03,495 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 06:58:03,710 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-06-05 06:58:04,282 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 06:58:04,632 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-06-05 06:58:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:04,711 INFO L93 Difference]: Finished difference Result 2604 states and 8626 transitions. [2021-06-05 06:58:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:58:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:04,715 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 06:58:04,715 INFO L226 Difference]: Without dead ends: 2579 [2021-06-05 06:58:04,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2878.2ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:58:04,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2021-06-05 06:58:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 1939. [2021-06-05 06:58:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.392672858617131) internal successors, (6575), 1938 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6575 transitions. [2021-06-05 06:58:04,741 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6575 transitions. Word has length 26 [2021-06-05 06:58:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:04,742 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 6575 transitions. [2021-06-05 06:58:04,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6575 transitions. [2021-06-05 06:58:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:04,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:04,744 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:04,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3219 [2021-06-05 06:58:04,945 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1089911327, now seen corresponding path program 61 times [2021-06-05 06:58:04,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:04,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610308636] [2021-06-05 06:58:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:05,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:05,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610308636] [2021-06-05 06:58:05,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610308636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:05,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643159404] [2021-06-05 06:58:05,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:05,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:58:05,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:05,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,843 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:05,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 1 [2021-06-05 06:58:05,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:05,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,880 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:05,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 63 [2021-06-05 06:58:05,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:05,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,900 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:05,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 62 [2021-06-05 06:58:05,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:05,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,932 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:05,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 65 [2021-06-05 06:58:05,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:05,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,953 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:05,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 1 [2021-06-05 06:58:05,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:05,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,975 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:05,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 06:58:05,976 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:05,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:05,996 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:05,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 1 [2021-06-05 06:58:05,997 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,016 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:06,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 126 treesize of output 1 [2021-06-05 06:58:06,017 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,038 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:06,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 1 [2021-06-05 06:58:06,038 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,069 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:06,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 74 [2021-06-05 06:58:06,072 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,093 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:06,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 1 [2021-06-05 06:58:06,093 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,114 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:06,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-06-05 06:58:06,114 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,134 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:06,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 1 [2021-06-05 06:58:06,135 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,164 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:06,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 69 [2021-06-05 06:58:06,166 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,184 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:06,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-06-05 06:58:06,185 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,191 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:58:06,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 54 [2021-06-05 06:58:06,193 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,239 INFO L628 ElimStorePlain]: treesize reduction 66, result has 38.3 percent of original size [2021-06-05 06:58:06,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:58:06,241 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:2101, output treesize:30 [2021-06-05 06:58:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:06,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643159404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:06,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:06,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:58:06,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355713464] [2021-06-05 06:58:06,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:06,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:06,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:06,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:06,278 INFO L87 Difference]: Start difference. First operand 1939 states and 6575 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:07,063 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 06:58:07,348 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 06:58:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:07,884 INFO L93 Difference]: Finished difference Result 2711 states and 8858 transitions. [2021-06-05 06:58:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:58:07,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:07,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:07,888 INFO L225 Difference]: With dead ends: 2711 [2021-06-05 06:58:07,888 INFO L226 Difference]: Without dead ends: 2674 [2021-06-05 06:58:07,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1787.3ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:58:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-06-05 06:58:07,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 1951. [2021-06-05 06:58:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:07,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-06-05 06:58:07,913 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-06-05 06:58:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:07,913 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-06-05 06:58:07,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-06-05 06:58:07,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:07,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:07,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:08,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3250,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:08,116 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:08,116 INFO L82 PathProgramCache]: Analyzing trace with hash -164417461, now seen corresponding path program 62 times [2021-06-05 06:58:08,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:08,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268555419] [2021-06-05 06:58:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:08,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:08,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268555419] [2021-06-05 06:58:08,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268555419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:08,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351377924] [2021-06-05 06:58:08,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:08,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:08,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:58:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:08,836 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 06:58:08,876 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_448, v_prenex_452], 6=[A, v_prenex_450]} [2021-06-05 06:58:08,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:08,896 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 06:58:08,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 41 [2021-06-05 06:58:08,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:08,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:08,909 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 06:58:08,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 06:58:08,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:09,073 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2021-06-05 06:58:09,073 INFO L628 ElimStorePlain]: treesize reduction 303, result has 45.9 percent of original size [2021-06-05 06:58:09,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:09,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:58:09,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:09,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:09,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:09,150 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:58:09,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 101 treesize of output 52 [2021-06-05 06:58:09,152 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:09,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:09,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:09,211 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:58:09,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 47 [2021-06-05 06:58:09,213 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:09,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:09,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:58:09,251 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:691, output treesize:55 [2021-06-05 06:58:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:09,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351377924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:09,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:09,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:58:09,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298047651] [2021-06-05 06:58:09,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:09,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:09,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:09,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:09,314 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:10,993 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 06:58:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:11,164 INFO L93 Difference]: Finished difference Result 2506 states and 8326 transitions. [2021-06-05 06:58:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:58:11,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:11,168 INFO L225 Difference]: With dead ends: 2506 [2021-06-05 06:58:11,168 INFO L226 Difference]: Without dead ends: 2491 [2021-06-05 06:58:11,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2069.6ms TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:58:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-05 06:58:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1951. [2021-06-05 06:58:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-06-05 06:58:11,190 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-06-05 06:58:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:11,190 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-06-05 06:58:11,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-06-05 06:58:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:11,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:11,192 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:11,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-06-05 06:58:11,393 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1406408139, now seen corresponding path program 63 times [2021-06-05 06:58:11,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:11,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952606686] [2021-06-05 06:58:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:11,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:11,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952606686] [2021-06-05 06:58:11,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952606686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:11,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079382523] [2021-06-05 06:58:11,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:11,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:58:11,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:11,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:58:11,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:12,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,066 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 06:58:12,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 49 [2021-06-05 06:58:12,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,099 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 06:58:12,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 47 [2021-06-05 06:58:12,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,120 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:12,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 06:58:12,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,148 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 06:58:12,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:58:12,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,180 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 06:58:12,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 49 [2021-06-05 06:58:12,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,201 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:12,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:58:12,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,221 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:12,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 06:58:12,222 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,250 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 06:58:12,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 47 [2021-06-05 06:58:12,251 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,279 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 06:58:12,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 35 [2021-06-05 06:58:12,280 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,299 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:12,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 06:58:12,300 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,319 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:12,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:58:12,319 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,340 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:12,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 06:58:12,340 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,361 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:12,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 06:58:12,362 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,381 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:12,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 06:58:12,382 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,398 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:12,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 06:58:12,399 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:12,411 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:12,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 06:58:12,411 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:12,559 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-06-05 06:58:12,559 INFO L628 ElimStorePlain]: treesize reduction 148, result has 49.5 percent of original size [2021-06-05 06:58:12,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:58:12,561 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1321, output treesize:145 [2021-06-05 06:58:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:12,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079382523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:12,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:12,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 06:58:12,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47638348] [2021-06-05 06:58:12,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:58:12,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:12,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:58:12,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:58:12,885 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:13,635 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 06:58:14,328 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 06:58:14,478 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-06-05 06:58:14,854 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-06-05 06:58:15,503 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 06:58:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:15,869 INFO L93 Difference]: Finished difference Result 2931 states and 9407 transitions. [2021-06-05 06:58:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:58:15,869 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:15,873 INFO L225 Difference]: With dead ends: 2931 [2021-06-05 06:58:15,873 INFO L226 Difference]: Without dead ends: 2858 [2021-06-05 06:58:15,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 3025.1ms TimeCoverageRelationStatistics Valid=461, Invalid=1795, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:58:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-06-05 06:58:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2137. [2021-06-05 06:58:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.387172284644195) internal successors, (7235), 2136 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 7235 transitions. [2021-06-05 06:58:15,901 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 7235 transitions. Word has length 26 [2021-06-05 06:58:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:15,901 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 7235 transitions. [2021-06-05 06:58:15,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 7235 transitions. [2021-06-05 06:58:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:15,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:15,903 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:16,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-06-05 06:58:16,104 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:16,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:16,104 INFO L82 PathProgramCache]: Analyzing trace with hash -958901773, now seen corresponding path program 54 times [2021-06-05 06:58:16,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:16,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786108930] [2021-06-05 06:58:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:16,469 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 06:58:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:16,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:16,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786108930] [2021-06-05 06:58:16,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786108930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:16,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325514738] [2021-06-05 06:58:16,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:16,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:58:16,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:16,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:58:16,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:17,255 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 06:58:17,535 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:58:17,677 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_464, v_prenex_466, v_prenex_468], 3=[A, v_prenex_462, v_prenex_463, v_prenex_465, v_prenex_467]} [2021-06-05 06:58:17,705 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:58:17,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 06:58:17,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:17,891 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 06:58:17,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:17,919 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:58:17,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:58:17,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:18,128 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 06:58:18,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:18,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:18,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 06:58:18,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:18,337 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-06-05 06:58:18,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:18,359 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:58:18,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 53 [2021-06-05 06:58:18,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:18,540 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 06:58:18,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:18,568 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:58:18,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 64 [2021-06-05 06:58:18,582 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:18,757 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 06:58:18,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:18,782 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:58:18,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-06-05 06:58:18,784 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:18,961 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 06:58:18,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:18,987 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:58:18,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 71 [2021-06-05 06:58:18,989 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:19,159 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 06:58:19,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:19,182 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:58:19,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 57 [2021-06-05 06:58:19,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:19,348 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 06:58:19,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:19,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:58:19,364 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:606, output treesize:480 [2021-06-05 06:58:19,606 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-06-05 06:58:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:19,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325514738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:19,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:19,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:58:19,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384172822] [2021-06-05 06:58:19,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:58:19,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:58:19,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:19,706 INFO L87 Difference]: Start difference. First operand 2137 states and 7235 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:20,425 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 06:58:20,578 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 06:58:21,256 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 06:58:21,715 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 84 [2021-06-05 06:58:22,034 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 06:58:23,000 WARN L205 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 103 [2021-06-05 06:58:23,560 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 129 [2021-06-05 06:58:24,573 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 123 [2021-06-05 06:58:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:25,078 INFO L93 Difference]: Finished difference Result 2788 states and 9199 transitions. [2021-06-05 06:58:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:58:25,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:25,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:25,082 INFO L225 Difference]: With dead ends: 2788 [2021-06-05 06:58:25,082 INFO L226 Difference]: Without dead ends: 2773 [2021-06-05 06:58:25,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 5470.9ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:58:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2021-06-05 06:58:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2145. [2021-06-05 06:58:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 3.3857276119402986) internal successors, (7259), 2144 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 7259 transitions. [2021-06-05 06:58:25,108 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 7259 transitions. Word has length 26 [2021-06-05 06:58:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:25,108 INFO L482 AbstractCegarLoop]: Abstraction has 2145 states and 7259 transitions. [2021-06-05 06:58:25,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 7259 transitions. [2021-06-05 06:58:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:25,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:25,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:25,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:25,311 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1718532743, now seen corresponding path program 55 times [2021-06-05 06:58:25,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:25,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633425832] [2021-06-05 06:58:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:25,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:25,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633425832] [2021-06-05 06:58:25,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633425832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:25,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430726629] [2021-06-05 06:58:25,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:58:25,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:26,318 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 06:58:26,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:26,409 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:58:26,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 06:58:26,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:26,556 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 06:58:26,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:26,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:26,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:26,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:58:26,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:26,712 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 06:58:26,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:26,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:26,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:26,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:58:26,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:26,888 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 06:58:26,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:26,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:26,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:26,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:58:26,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:27,041 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 06:58:27,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:27,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:27,055 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:58:27,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:58:27,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:27,185 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 06:58:27,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:27,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:27,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:27,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:58:27,200 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:27,328 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 06:58:27,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:27,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:27,341 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:58:27,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:58:27,342 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:27,465 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 06:58:27,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:27,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:27,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:27,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:58:27,479 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:27,593 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 06:58:27,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:27,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:58:27,618 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 06:58:27,775 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-05 06:58:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:27,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430726629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:27,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:27,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:58:27,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616916339] [2021-06-05 06:58:27,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:27,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:27,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:27,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:27,856 INFO L87 Difference]: Start difference. First operand 2145 states and 7259 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:28,232 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 06:58:28,507 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-06-05 06:58:29,158 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 06:58:29,547 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-06-05 06:58:29,787 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 06:58:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:30,044 INFO L93 Difference]: Finished difference Result 2992 states and 9916 transitions. [2021-06-05 06:58:30,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:58:30,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:30,048 INFO L225 Difference]: With dead ends: 2992 [2021-06-05 06:58:30,049 INFO L226 Difference]: Without dead ends: 2977 [2021-06-05 06:58:30,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2579.4ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2021-06-05 06:58:30,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2139. [2021-06-05 06:58:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.3835360149672593) internal successors, (7234), 2138 states have internal predecessors, (7234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7234 transitions. [2021-06-05 06:58:30,080 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7234 transitions. Word has length 26 [2021-06-05 06:58:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:30,080 INFO L482 AbstractCegarLoop]: Abstraction has 2139 states and 7234 transitions. [2021-06-05 06:58:30,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7234 transitions. [2021-06-05 06:58:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:30,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:30,083 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:30,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3366 [2021-06-05 06:58:30,284 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:30,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:30,284 INFO L82 PathProgramCache]: Analyzing trace with hash 28589839, now seen corresponding path program 56 times [2021-06-05 06:58:30,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:30,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098658370] [2021-06-05 06:58:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:30,694 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 06:58:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:30,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:30,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098658370] [2021-06-05 06:58:30,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098658370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:30,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126037889] [2021-06-05 06:58:30,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:30,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:30,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:30,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:30,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:31,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,138 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:58:31,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 57 [2021-06-05 06:58:31,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,157 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:58:31,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-06-05 06:58:31,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,175 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:58:31,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-06-05 06:58:31,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,187 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:31,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 06:58:31,188 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,206 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:58:31,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 06:58:31,208 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,232 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:58:31,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 53 [2021-06-05 06:58:31,233 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,252 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:58:31,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 50 [2021-06-05 06:58:31,253 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,265 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:31,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 06:58:31,266 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,278 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:31,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 39 [2021-06-05 06:58:31,279 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,291 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:31,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 06:58:31,292 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,303 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:31,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 06:58:31,304 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,316 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:31,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 06:58:31,317 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,328 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:31,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 06:58:31,329 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,341 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:31,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 06:58:31,342 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:31,361 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:58:31,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 06:58:31,363 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,368 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-06-05 06:58:31,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 06:58:31,369 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,488 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-06-05 06:58:31,488 INFO L628 ElimStorePlain]: treesize reduction 123, result has 39.4 percent of original size [2021-06-05 06:58:31,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:58:31,489 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1445, output treesize:80 [2021-06-05 06:58:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:31,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126037889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:31,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:31,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:58:31,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458716976] [2021-06-05 06:58:31,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:58:31,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:31,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:58:31,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:31,626 INFO L87 Difference]: Start difference. First operand 2139 states and 7234 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:31,916 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 06:58:32,611 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 06:58:32,756 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2021-06-05 06:58:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:33,129 INFO L93 Difference]: Finished difference Result 2826 states and 9360 transitions. [2021-06-05 06:58:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:58:33,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:33,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:33,133 INFO L225 Difference]: With dead ends: 2826 [2021-06-05 06:58:33,134 INFO L226 Difference]: Without dead ends: 2801 [2021-06-05 06:58:33,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1868.4ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:58:33,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-05 06:58:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2126. [2021-06-05 06:58:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-06-05 06:58:33,162 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-06-05 06:58:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:33,162 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-06-05 06:58:33,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-06-05 06:58:33,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:33,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:33,165 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:33,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3380,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:33,367 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:33,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1781836725, now seen corresponding path program 57 times [2021-06-05 06:58:33,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:33,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815788196] [2021-06-05 06:58:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:33,718 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 06:58:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:33,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:33,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815788196] [2021-06-05 06:58:33,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815788196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:33,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304517572] [2021-06-05 06:58:33,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:33,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:58:33,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:33,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:33,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:34,312 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-05 06:58:34,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:34,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 06:58:34,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,534 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:58:34,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2021-06-05 06:58:34,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,909 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-05 06:58:34,909 INFO L628 ElimStorePlain]: treesize reduction 12, result has 97.7 percent of original size [2021-06-05 06:58:34,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,927 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:58:34,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 06:58:34,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:34,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2021-06-05 06:58:34,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:35,240 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-06-05 06:58:35,240 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.9 percent of original size [2021-06-05 06:58:35,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:35,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:35,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:35,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 56 [2021-06-05 06:58:35,258 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:35,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:35,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:35,269 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:58:35,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 1 [2021-06-05 06:58:35,270 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:35,380 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 06:58:35,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:35,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:35,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:35,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 41 [2021-06-05 06:58:35,398 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:35,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:35,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-06-05 06:58:35,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:35,676 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 06:58:35,677 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.5 percent of original size [2021-06-05 06:58:35,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:58:35,683 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:559, output treesize:189 [2021-06-05 06:58:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:35,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304517572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:35,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:35,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:58:35,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482487656] [2021-06-05 06:58:35,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:35,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:35,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:35,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:35,874 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:37,013 INFO L93 Difference]: Finished difference Result 2742 states and 9142 transitions. [2021-06-05 06:58:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:58:37,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:37,018 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 06:58:37,018 INFO L226 Difference]: Without dead ends: 2727 [2021-06-05 06:58:37,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1610.2ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:58:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-06-05 06:58:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2126. [2021-06-05 06:58:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-06-05 06:58:37,047 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-06-05 06:58:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:37,047 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-06-05 06:58:37,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-06-05 06:58:37,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:37,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:37,050 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:37,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:37,250 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:37,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:37,251 INFO L82 PathProgramCache]: Analyzing trace with hash -529489601, now seen corresponding path program 64 times [2021-06-05 06:58:37,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:37,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585057361] [2021-06-05 06:58:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:37,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:37,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585057361] [2021-06-05 06:58:37,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585057361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:37,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119420907] [2021-06-05 06:58:37,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:37,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:37,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:58:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,182 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 06:58:38,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,201 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-06-05 06:58:38,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,229 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:38,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 50 [2021-06-05 06:58:38,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,248 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-06-05 06:58:38,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,268 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 06:58:38,269 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,297 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:38,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-06-05 06:58:38,298 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,316 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-06-05 06:58:38,317 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,336 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-06-05 06:58:38,337 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,356 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-06-05 06:58:38,356 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,374 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-06-05 06:58:38,376 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,394 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-06-05 06:58:38,396 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,414 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-06-05 06:58:38,415 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,433 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 06:58:38,434 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,452 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-06-05 06:58:38,453 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,470 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:38,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 06:58:38,471 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:38,487 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:58:38,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 119 treesize of output 55 [2021-06-05 06:58:38,489 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,538 INFO L628 ElimStorePlain]: treesize reduction 74, result has 35.7 percent of original size [2021-06-05 06:58:38,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:58:38,539 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-06-05 06:58:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:38,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119420907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:38,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:38,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:58:38,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839228471] [2021-06-05 06:58:38,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:38,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:38,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:38,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:38,584 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:40,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:40,071 INFO L93 Difference]: Finished difference Result 2821 states and 9363 transitions. [2021-06-05 06:58:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:58:40,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:40,075 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 06:58:40,075 INFO L226 Difference]: Without dead ends: 2799 [2021-06-05 06:58:40,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1616.8ms TimeCoverageRelationStatistics Valid=289, Invalid=1043, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:58:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-06-05 06:58:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2120. [2021-06-05 06:58:40,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.382255781028787) internal successors, (7167), 2119 states have internal predecessors, (7167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7167 transitions. [2021-06-05 06:58:40,100 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7167 transitions. Word has length 26 [2021-06-05 06:58:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:40,101 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7167 transitions. [2021-06-05 06:58:40,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7167 transitions. [2021-06-05 06:58:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:40,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:40,103 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:40,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3407 [2021-06-05 06:58:40,303 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash -815414513, now seen corresponding path program 65 times [2021-06-05 06:58:40,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:40,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822246146] [2021-06-05 06:58:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:40,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:40,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822246146] [2021-06-05 06:58:40,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822246146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:40,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464965598] [2021-06-05 06:58:40,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:40,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:58:40,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:40,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:58:40,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:41,043 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 06:58:41,099 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_493], 5=[v_prenex_491, v_prenex_495]} [2021-06-05 06:58:41,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:41,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:41,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:41,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:41,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:58:41,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:41,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:41,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:41,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:41,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:58:41,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:41,257 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 06:58:41,258 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-06-05 06:58:41,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:41,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:41,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 06:58:41,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:41,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:41,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:41,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:41,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:41,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 06:58:41,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:41,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:41,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:41,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:41,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2021-06-05 06:58:41,366 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:41,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:41,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:58:41,406 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-06-05 06:58:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:41,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464965598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:41,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:41,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:58:41,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025852299] [2021-06-05 06:58:41,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:58:41,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:41,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:58:41,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:41,454 INFO L87 Difference]: Start difference. First operand 2120 states and 7167 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:42,744 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 06:58:42,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:42,854 INFO L93 Difference]: Finished difference Result 2661 states and 8818 transitions. [2021-06-05 06:58:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:58:42,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:42,858 INFO L225 Difference]: With dead ends: 2661 [2021-06-05 06:58:42,858 INFO L226 Difference]: Without dead ends: 2642 [2021-06-05 06:58:42,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1599.1ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:58:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-05 06:58:42,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2120. [2021-06-05 06:58:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:42,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-06-05 06:58:42,883 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-06-05 06:58:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:42,883 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-06-05 06:58:42,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-06-05 06:58:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:42,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:42,885 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:43,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3465,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:43,086 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:43,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:43,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1107808399, now seen corresponding path program 66 times [2021-06-05 06:58:43,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:43,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415163716] [2021-06-05 06:58:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:43,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:43,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415163716] [2021-06-05 06:58:43,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415163716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:43,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017491606] [2021-06-05 06:58:43,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:43,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:58:43,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:43,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:58:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:43,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,740 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-06-05 06:58:43,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 55 [2021-06-05 06:58:43,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,778 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 06:58:43,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2021-06-05 06:58:43,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,809 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 06:58:43,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 40 [2021-06-05 06:58:43,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,840 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-05 06:58:43,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 42 [2021-06-05 06:58:43,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,860 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:43,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 06:58:43,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,899 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-06-05 06:58:43,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 55 [2021-06-05 06:58:43,902 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,920 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:43,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:58:43,922 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:43,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 71 [2021-06-05 06:58:43,962 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,992 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-06-05 06:58:43,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 40 [2021-06-05 06:58:43,994 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:44,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,024 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 06:58:44,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 42 [2021-06-05 06:58:44,025 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:44,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,043 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:44,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:58:44,045 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:44,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,065 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:44,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 06:58:44,065 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:44,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,084 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:44,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 06:58:44,085 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:44,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,105 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:44,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 1 [2021-06-05 06:58:44,105 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:44,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,125 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:44,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 06:58:44,126 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:44,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:44,138 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:44,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 06:58:44,139 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:44,264 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 21 [2021-06-05 06:58:44,264 INFO L628 ElimStorePlain]: treesize reduction 283, result has 16.3 percent of original size [2021-06-05 06:58:44,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:58:44,265 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1081, output treesize:55 [2021-06-05 06:58:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:44,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017491606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:44,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:44,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:58:44,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50697598] [2021-06-05 06:58:44,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:44,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:44,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:44,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:44,375 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:45,849 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 06:58:45,992 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 06:58:46,312 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 06:58:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:46,592 INFO L93 Difference]: Finished difference Result 2604 states and 8571 transitions. [2021-06-05 06:58:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:58:46,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:46,596 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 06:58:46,596 INFO L226 Difference]: Without dead ends: 2574 [2021-06-05 06:58:46,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2269.3ms TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:58:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-06-05 06:58:46,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2120. [2021-06-05 06:58:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-06-05 06:58:46,622 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-06-05 06:58:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:46,622 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-06-05 06:58:46,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-06-05 06:58:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:46,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:46,624 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:46,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:46,825 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:46,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1424792101, now seen corresponding path program 58 times [2021-06-05 06:58:46,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:46,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039629691] [2021-06-05 06:58:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:46,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:46,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039629691] [2021-06-05 06:58:46,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039629691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:46,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736081082] [2021-06-05 06:58:46,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:46,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:46,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:46,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:46,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:46,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736081082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:46,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:46,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:58:46,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859554288] [2021-06-05 06:58:46,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:46,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:46,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:46,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:46,995 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:47,961 INFO L93 Difference]: Finished difference Result 5051 states and 15656 transitions. [2021-06-05 06:58:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:58:47,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:47,969 INFO L225 Difference]: With dead ends: 5051 [2021-06-05 06:58:47,969 INFO L226 Difference]: Without dead ends: 5051 [2021-06-05 06:58:47,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:58:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-05 06:58:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 2317. [2021-06-05 06:58:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.435233160621762) internal successors, (7956), 2316 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7956 transitions. [2021-06-05 06:58:48,013 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7956 transitions. Word has length 28 [2021-06-05 06:58:48,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:48,013 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 7956 transitions. [2021-06-05 06:58:48,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:48,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7956 transitions. [2021-06-05 06:58:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:48,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:48,016 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:48,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3508 [2021-06-05 06:58:48,217 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:48,217 INFO L82 PathProgramCache]: Analyzing trace with hash 448473257, now seen corresponding path program 59 times [2021-06-05 06:58:48,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:48,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220585164] [2021-06-05 06:58:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:48,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:48,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220585164] [2021-06-05 06:58:48,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220585164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:48,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623082503] [2021-06-05 06:58:48,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:48,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:58:48,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:48,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:48,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:48,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623082503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:48,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:48,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:58:48,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781049958] [2021-06-05 06:58:48,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:58:48,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:48,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:58:48,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:58:48,401 INFO L87 Difference]: Start difference. First operand 2317 states and 7956 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:49,674 INFO L93 Difference]: Finished difference Result 6617 states and 20175 transitions. [2021-06-05 06:58:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:58:49,674 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:49,683 INFO L225 Difference]: With dead ends: 6617 [2021-06-05 06:58:49,683 INFO L226 Difference]: Without dead ends: 6617 [2021-06-05 06:58:49,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 767.9ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:58:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-06-05 06:58:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2331. [2021-06-05 06:58:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.4437768240343347) internal successors, (8024), 2330 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 8024 transitions. [2021-06-05 06:58:49,733 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 8024 transitions. Word has length 28 [2021-06-05 06:58:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:49,733 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 8024 transitions. [2021-06-05 06:58:49,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 8024 transitions. [2021-06-05 06:58:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:49,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:49,736 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:49,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3509 [2021-06-05 06:58:49,941 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:49,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1977377901, now seen corresponding path program 60 times [2021-06-05 06:58:49,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:49,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603293367] [2021-06-05 06:58:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:49,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:49,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603293367] [2021-06-05 06:58:49,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603293367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:49,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658955791] [2021-06-05 06:58:49,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:50,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:58:50,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:50,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:50,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:50,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658955791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:50,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:50,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:58:50,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508442426] [2021-06-05 06:58:50,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:58:50,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:50,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:58:50,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:58:50,138 INFO L87 Difference]: Start difference. First operand 2331 states and 8024 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:51,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:51,433 INFO L93 Difference]: Finished difference Result 6008 states and 18701 transitions. [2021-06-05 06:58:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:58:51,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:51,441 INFO L225 Difference]: With dead ends: 6008 [2021-06-05 06:58:51,441 INFO L226 Difference]: Without dead ends: 6008 [2021-06-05 06:58:51,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 776.5ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:58:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6008 states. [2021-06-05 06:58:51,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6008 to 2276. [2021-06-05 06:58:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.418901098901099) internal successors, (7778), 2275 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 7778 transitions. [2021-06-05 06:58:51,489 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 7778 transitions. Word has length 28 [2021-06-05 06:58:51,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:51,489 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 7778 transitions. [2021-06-05 06:58:51,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 7778 transitions. [2021-06-05 06:58:51,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:51,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:51,491 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:51,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3510,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:51,693 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1153995099, now seen corresponding path program 61 times [2021-06-05 06:58:51,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:51,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661513844] [2021-06-05 06:58:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:51,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:51,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661513844] [2021-06-05 06:58:51,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661513844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:51,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270046169] [2021-06-05 06:58:51,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:51,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:51,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:51,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270046169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:51,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:51,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:58:51,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237361180] [2021-06-05 06:58:51,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:51,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:51,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:51,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:51,882 INFO L87 Difference]: Start difference. First operand 2276 states and 7778 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:52,987 INFO L93 Difference]: Finished difference Result 5144 states and 15840 transitions. [2021-06-05 06:58:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:58:52,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:52,994 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 06:58:52,994 INFO L226 Difference]: Without dead ends: 5144 [2021-06-05 06:58:52,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 686.4ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:58:52,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-06-05 06:58:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 2286. [2021-06-05 06:58:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 3.415317286652079) internal successors, (7804), 2285 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 7804 transitions. [2021-06-05 06:58:53,050 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 7804 transitions. Word has length 28 [2021-06-05 06:58:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:53,051 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 7804 transitions. [2021-06-05 06:58:53,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 7804 transitions. [2021-06-05 06:58:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:53,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:53,053 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:53,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3511,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:53,254 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:53,254 INFO L82 PathProgramCache]: Analyzing trace with hash 987823393, now seen corresponding path program 67 times [2021-06-05 06:58:53,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:53,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704522809] [2021-06-05 06:58:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:53,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:53,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704522809] [2021-06-05 06:58:53,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704522809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:53,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584071382] [2021-06-05 06:58:53,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:53,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:53,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:53,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584071382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:53,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:53,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:58:53,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249667862] [2021-06-05 06:58:53,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:53,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:53,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:53,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:53,420 INFO L87 Difference]: Start difference. First operand 2286 states and 7804 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:54,007 INFO L93 Difference]: Finished difference Result 4580 states and 14284 transitions. [2021-06-05 06:58:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:58:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:54,013 INFO L225 Difference]: With dead ends: 4580 [2021-06-05 06:58:54,014 INFO L226 Difference]: Without dead ends: 4580 [2021-06-05 06:58:54,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:58:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4580 states. [2021-06-05 06:58:54,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4580 to 2356. [2021-06-05 06:58:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.4) internal successors, (8007), 2355 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8007 transitions. [2021-06-05 06:58:54,058 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8007 transitions. Word has length 28 [2021-06-05 06:58:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:54,058 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 8007 transitions. [2021-06-05 06:58:54,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8007 transitions. [2021-06-05 06:58:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:54,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:54,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:54,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3512,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:54,262 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:54,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:54,262 INFO L82 PathProgramCache]: Analyzing trace with hash 846454761, now seen corresponding path program 62 times [2021-06-05 06:58:54,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:54,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572886525] [2021-06-05 06:58:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:54,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:54,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572886525] [2021-06-05 06:58:54,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572886525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:54,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58254111] [2021-06-05 06:58:54,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:54,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:54,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:54,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:54,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58254111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:54,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:54,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:58:54,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741387379] [2021-06-05 06:58:54,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:58:54,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:54,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:58:54,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:58:54,378 INFO L87 Difference]: Start difference. First operand 2356 states and 8007 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:54,564 INFO L93 Difference]: Finished difference Result 3884 states and 12614 transitions. [2021-06-05 06:58:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:58:54,564 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:54,569 INFO L225 Difference]: With dead ends: 3884 [2021-06-05 06:58:54,570 INFO L226 Difference]: Without dead ends: 3866 [2021-06-05 06:58:54,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:58:54,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2021-06-05 06:58:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 2736. [2021-06-05 06:58:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 3.4661791590493602) internal successors, (9480), 2735 states have internal predecessors, (9480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 9480 transitions. [2021-06-05 06:58:54,610 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 9480 transitions. Word has length 28 [2021-06-05 06:58:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:54,610 INFO L482 AbstractCegarLoop]: Abstraction has 2736 states and 9480 transitions. [2021-06-05 06:58:54,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 9480 transitions. [2021-06-05 06:58:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:54,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:54,614 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:54,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3513,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:54,814 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:54,815 INFO L82 PathProgramCache]: Analyzing trace with hash 409486053, now seen corresponding path program 63 times [2021-06-05 06:58:54,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:54,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186303186] [2021-06-05 06:58:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:54,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:54,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186303186] [2021-06-05 06:58:54,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186303186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:54,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282524020] [2021-06-05 06:58:54,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:54,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:58:54,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:54,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:58:54,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:54,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282524020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:54,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:54,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:58:54,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454474373] [2021-06-05 06:58:54,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:58:54,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:54,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:58:54,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:58:54,986 INFO L87 Difference]: Start difference. First operand 2736 states and 9480 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:55,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:55,582 INFO L93 Difference]: Finished difference Result 4561 states and 14499 transitions. [2021-06-05 06:58:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:58:55,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:55,588 INFO L225 Difference]: With dead ends: 4561 [2021-06-05 06:58:55,588 INFO L226 Difference]: Without dead ends: 4514 [2021-06-05 06:58:55,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:58:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2021-06-05 06:58:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 2898. [2021-06-05 06:58:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 3.486365205384881) internal successors, (10100), 2897 states have internal predecessors, (10100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 10100 transitions. [2021-06-05 06:58:55,636 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 10100 transitions. Word has length 28 [2021-06-05 06:58:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:55,636 INFO L482 AbstractCegarLoop]: Abstraction has 2898 states and 10100 transitions. [2021-06-05 06:58:55,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 10100 transitions. [2021-06-05 06:58:55,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:55,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:55,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:55,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3514,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:55,847 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:55,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1945575529, now seen corresponding path program 64 times [2021-06-05 06:58:55,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:55,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254012238] [2021-06-05 06:58:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:55,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:55,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254012238] [2021-06-05 06:58:55,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254012238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:55,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984289718] [2021-06-05 06:58:55,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:55,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:55,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:55,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:58:55,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:56,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984289718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:56,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:56,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:58:56,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469871755] [2021-06-05 06:58:56,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:56,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:56,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:56,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:56,049 INFO L87 Difference]: Start difference. First operand 2898 states and 10100 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:56,806 INFO L93 Difference]: Finished difference Result 4846 states and 15131 transitions. [2021-06-05 06:58:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:58:56,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:56,830 INFO L225 Difference]: With dead ends: 4846 [2021-06-05 06:58:56,830 INFO L226 Difference]: Without dead ends: 4820 [2021-06-05 06:58:56,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:58:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4820 states. [2021-06-05 06:58:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4820 to 2913. [2021-06-05 06:58:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4903846153846154) internal successors, (10164), 2912 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10164 transitions. [2021-06-05 06:58:56,882 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10164 transitions. Word has length 28 [2021-06-05 06:58:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:56,882 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10164 transitions. [2021-06-05 06:58:56,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10164 transitions. [2021-06-05 06:58:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:56,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:56,886 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:57,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3515,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:57,087 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:57,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1676978985, now seen corresponding path program 65 times [2021-06-05 06:58:57,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:57,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375137243] [2021-06-05 06:58:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:57,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:57,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375137243] [2021-06-05 06:58:57,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375137243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:57,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851119293] [2021-06-05 06:58:57,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:57,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:58:57,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:57,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:58:57,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:57,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851119293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:57,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:57,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:58:57,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764407915] [2021-06-05 06:58:57,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:57,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:57,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:57,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:57,272 INFO L87 Difference]: Start difference. First operand 2913 states and 10164 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:57,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:57,989 INFO L93 Difference]: Finished difference Result 4838 states and 15131 transitions. [2021-06-05 06:58:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:58:57,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:57,995 INFO L225 Difference]: With dead ends: 4838 [2021-06-05 06:58:57,995 INFO L226 Difference]: Without dead ends: 4823 [2021-06-05 06:58:57,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:58:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2021-06-05 06:58:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 2913. [2021-06-05 06:58:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.48592032967033) internal successors, (10151), 2912 states have internal predecessors, (10151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10151 transitions. [2021-06-05 06:58:58,044 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10151 transitions. Word has length 28 [2021-06-05 06:58:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:58,044 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10151 transitions. [2021-06-05 06:58:58,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10151 transitions. [2021-06-05 06:58:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:58,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:58,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:58,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3516 [2021-06-05 06:58:58,248 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:58,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:58,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1569189389, now seen corresponding path program 66 times [2021-06-05 06:58:58,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:58,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394046540] [2021-06-05 06:58:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:58,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:58,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394046540] [2021-06-05 06:58:58,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394046540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:58,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138939104] [2021-06-05 06:58:58,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:58,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:58:58,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:58,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:58:58,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:58,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138939104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:58,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:58,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:58:58,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667710738] [2021-06-05 06:58:58,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:58:58,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:58,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:58:58,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:58:58,384 INFO L87 Difference]: Start difference. First operand 2913 states and 10151 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:58,958 INFO L93 Difference]: Finished difference Result 5599 states and 17892 transitions. [2021-06-05 06:58:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:58:58,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:58,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:58,965 INFO L225 Difference]: With dead ends: 5599 [2021-06-05 06:58:58,965 INFO L226 Difference]: Without dead ends: 5552 [2021-06-05 06:58:58,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:58:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-06-05 06:58:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 3063. [2021-06-05 06:58:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 3.5303723056825604) internal successors, (10810), 3062 states have internal predecessors, (10810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 10810 transitions. [2021-06-05 06:58:59,019 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 10810 transitions. Word has length 28 [2021-06-05 06:58:59,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:59,019 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 10810 transitions. [2021-06-05 06:58:59,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 10810 transitions. [2021-06-05 06:58:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:59,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:59,023 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:59,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3517 [2021-06-05 06:58:59,224 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:59,224 INFO L82 PathProgramCache]: Analyzing trace with hash -641999155, now seen corresponding path program 67 times [2021-06-05 06:58:59,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:59,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230330598] [2021-06-05 06:58:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:59,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:59,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230330598] [2021-06-05 06:58:59,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230330598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:59,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556656239] [2021-06-05 06:58:59,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:59,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:59,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556656239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:59,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:59,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:58:59,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495068312] [2021-06-05 06:58:59,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:58:59,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:59,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:58:59,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:58:59,335 INFO L87 Difference]: Start difference. First operand 3063 states and 10810 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:59,500 INFO L93 Difference]: Finished difference Result 4390 states and 14427 transitions. [2021-06-05 06:58:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:58:59,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:59,506 INFO L225 Difference]: With dead ends: 4390 [2021-06-05 06:58:59,506 INFO L226 Difference]: Without dead ends: 4390 [2021-06-05 06:58:59,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2021-06-05 06:58:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 2947. [2021-06-05 06:58:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2946 states have (on average 3.5020366598778003) internal successors, (10317), 2946 states have internal predecessors, (10317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 10317 transitions. [2021-06-05 06:58:59,549 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 10317 transitions. Word has length 28 [2021-06-05 06:58:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:59,549 INFO L482 AbstractCegarLoop]: Abstraction has 2947 states and 10317 transitions. [2021-06-05 06:58:59,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 10317 transitions. [2021-06-05 06:58:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:59,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:59,553 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:59,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3518,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:59,753 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:59,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1988680721, now seen corresponding path program 68 times [2021-06-05 06:58:59,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:59,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112638148] [2021-06-05 06:58:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:59,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:59,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112638148] [2021-06-05 06:58:59,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112638148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:59,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164913173] [2021-06-05 06:58:59,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:59,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:59,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:59,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:59,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164913173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:59,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:59,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:58:59,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058155620] [2021-06-05 06:58:59,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:58:59,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:59,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:58:59,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:58:59,891 INFO L87 Difference]: Start difference. First operand 2947 states and 10317 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:00,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:00,607 INFO L93 Difference]: Finished difference Result 6294 states and 19912 transitions. [2021-06-05 06:59:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:59:00,608 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:00,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:00,615 INFO L225 Difference]: With dead ends: 6294 [2021-06-05 06:59:00,615 INFO L226 Difference]: Without dead ends: 6294 [2021-06-05 06:59:00,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:59:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2021-06-05 06:59:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 2965. [2021-06-05 06:59:00,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 3.5020242914979756) internal successors, (10380), 2964 states have internal predecessors, (10380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 10380 transitions. [2021-06-05 06:59:00,667 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 10380 transitions. Word has length 28 [2021-06-05 06:59:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:00,667 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 10380 transitions. [2021-06-05 06:59:00,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 10380 transitions. [2021-06-05 06:59:00,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:00,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:00,670 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:00,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3519 [2021-06-05 06:59:00,871 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:00,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:00,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1203766627, now seen corresponding path program 69 times [2021-06-05 06:59:00,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:00,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927842678] [2021-06-05 06:59:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:00,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:00,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927842678] [2021-06-05 06:59:00,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927842678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:00,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578297353] [2021-06-05 06:59:00,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:00,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:00,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:00,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:00,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:01,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578297353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:01,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:01,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:59:01,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528114064] [2021-06-05 06:59:01,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:01,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:01,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:01,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:01,037 INFO L87 Difference]: Start difference. First operand 2965 states and 10380 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:01,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:01,843 INFO L93 Difference]: Finished difference Result 6549 states and 20685 transitions. [2021-06-05 06:59:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:59:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:01,852 INFO L225 Difference]: With dead ends: 6549 [2021-06-05 06:59:01,852 INFO L226 Difference]: Without dead ends: 6549 [2021-06-05 06:59:01,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:59:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2021-06-05 06:59:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 3059. [2021-06-05 06:59:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 3.4947678221059517) internal successors, (10687), 3058 states have internal predecessors, (10687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:01,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 10687 transitions. [2021-06-05 06:59:01,915 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 10687 transitions. Word has length 28 [2021-06-05 06:59:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:01,915 INFO L482 AbstractCegarLoop]: Abstraction has 3059 states and 10687 transitions. [2021-06-05 06:59:01,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 10687 transitions. [2021-06-05 06:59:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:01,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:01,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:02,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:02,119 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:02,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2008178013, now seen corresponding path program 70 times [2021-06-05 06:59:02,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:02,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003110395] [2021-06-05 06:59:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:02,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:02,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003110395] [2021-06-05 06:59:02,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003110395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:02,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896527858] [2021-06-05 06:59:02,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:02,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:02,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:02,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:02,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:02,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896527858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:02,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:02,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:59:02,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524384909] [2021-06-05 06:59:02,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:02,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:02,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:02,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:02,272 INFO L87 Difference]: Start difference. First operand 3059 states and 10687 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:02,903 INFO L93 Difference]: Finished difference Result 6709 states and 21196 transitions. [2021-06-05 06:59:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:59:02,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:02,912 INFO L225 Difference]: With dead ends: 6709 [2021-06-05 06:59:02,912 INFO L226 Difference]: Without dead ends: 6673 [2021-06-05 06:59:02,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:59:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2021-06-05 06:59:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 3461. [2021-06-05 06:59:02,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3461 states, 3460 states have (on average 3.5245664739884393) internal successors, (12195), 3460 states have internal predecessors, (12195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 12195 transitions. [2021-06-05 06:59:02,983 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 12195 transitions. Word has length 28 [2021-06-05 06:59:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:02,983 INFO L482 AbstractCegarLoop]: Abstraction has 3461 states and 12195 transitions. [2021-06-05 06:59:02,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 12195 transitions. [2021-06-05 06:59:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:02,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:02,987 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:03,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3521 [2021-06-05 06:59:03,188 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:03,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:03,188 INFO L82 PathProgramCache]: Analyzing trace with hash -815711165, now seen corresponding path program 71 times [2021-06-05 06:59:03,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:03,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062346538] [2021-06-05 06:59:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:03,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:03,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062346538] [2021-06-05 06:59:03,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062346538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:03,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957603748] [2021-06-05 06:59:03,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:03,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:59:03,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:03,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:03,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957603748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:03,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:03,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:59:03,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587540870] [2021-06-05 06:59:03,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:03,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:03,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:03,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:03,326 INFO L87 Difference]: Start difference. First operand 3461 states and 12195 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:03,957 INFO L93 Difference]: Finished difference Result 6846 states and 21557 transitions. [2021-06-05 06:59:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:59:03,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:03,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:03,966 INFO L225 Difference]: With dead ends: 6846 [2021-06-05 06:59:03,966 INFO L226 Difference]: Without dead ends: 6846 [2021-06-05 06:59:03,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:59:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2021-06-05 06:59:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 3175. [2021-06-05 06:59:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.484247006931317) internal successors, (11059), 3174 states have internal predecessors, (11059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11059 transitions. [2021-06-05 06:59:04,034 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11059 transitions. Word has length 28 [2021-06-05 06:59:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:04,034 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 11059 transitions. [2021-06-05 06:59:04,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11059 transitions. [2021-06-05 06:59:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:04,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:04,038 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:04,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:04,239 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:04,239 INFO L82 PathProgramCache]: Analyzing trace with hash -257646883, now seen corresponding path program 72 times [2021-06-05 06:59:04,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:04,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551227085] [2021-06-05 06:59:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:04,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:04,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551227085] [2021-06-05 06:59:04,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551227085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:04,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367768841] [2021-06-05 06:59:04,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:04,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:59:04,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:04,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:04,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:04,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367768841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:04,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:04,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:59:04,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739100831] [2021-06-05 06:59:04,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:04,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:04,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:04,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:04,376 INFO L87 Difference]: Start difference. First operand 3175 states and 11059 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:05,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:05,125 INFO L93 Difference]: Finished difference Result 6061 states and 19490 transitions. [2021-06-05 06:59:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:59:05,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:05,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:05,135 INFO L225 Difference]: With dead ends: 6061 [2021-06-05 06:59:05,135 INFO L226 Difference]: Without dead ends: 6057 [2021-06-05 06:59:05,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:59:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6057 states. [2021-06-05 06:59:05,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6057 to 2935. [2021-06-05 06:59:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.507498295841854) internal successors, (10291), 2934 states have internal predecessors, (10291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 10291 transitions. [2021-06-05 06:59:05,193 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 10291 transitions. Word has length 28 [2021-06-05 06:59:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:05,193 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 10291 transitions. [2021-06-05 06:59:05,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 10291 transitions. [2021-06-05 06:59:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:05,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:05,196 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:05,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3523,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:05,397 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:05,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:05,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1520596959, now seen corresponding path program 73 times [2021-06-05 06:59:05,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:05,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805478768] [2021-06-05 06:59:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:05,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:05,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805478768] [2021-06-05 06:59:05,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805478768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:05,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296823537] [2021-06-05 06:59:05,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:05,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:05,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:05,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296823537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:05,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:05,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:59:05,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371233198] [2021-06-05 06:59:05,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:05,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:05,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:05,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:05,589 INFO L87 Difference]: Start difference. First operand 2935 states and 10291 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:06,669 INFO L93 Difference]: Finished difference Result 9324 states and 30354 transitions. [2021-06-05 06:59:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:59:06,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:06,684 INFO L225 Difference]: With dead ends: 9324 [2021-06-05 06:59:06,684 INFO L226 Difference]: Without dead ends: 9324 [2021-06-05 06:59:06,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 623.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:59:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2021-06-05 06:59:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 3117. [2021-06-05 06:59:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 3.5805519897304237) internal successors, (11157), 3116 states have internal predecessors, (11157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 11157 transitions. [2021-06-05 06:59:06,775 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 11157 transitions. Word has length 28 [2021-06-05 06:59:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:06,776 INFO L482 AbstractCegarLoop]: Abstraction has 3117 states and 11157 transitions. [2021-06-05 06:59:06,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 11157 transitions. [2021-06-05 06:59:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:06,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:06,780 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:06,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3524,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:06,981 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:06,981 INFO L82 PathProgramCache]: Analyzing trace with hash 8307685, now seen corresponding path program 74 times [2021-06-05 06:59:06,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:06,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202785419] [2021-06-05 06:59:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:07,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:07,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202785419] [2021-06-05 06:59:07,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202785419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:07,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824678593] [2021-06-05 06:59:07,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:07,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:07,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:07,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:07,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:07,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824678593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:07,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:07,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:59:07,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341002592] [2021-06-05 06:59:07,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:07,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:07,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:07,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:07,158 INFO L87 Difference]: Start difference. First operand 3117 states and 11157 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:08,182 INFO L93 Difference]: Finished difference Result 9147 states and 29872 transitions. [2021-06-05 06:59:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:59:08,182 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:08,196 INFO L225 Difference]: With dead ends: 9147 [2021-06-05 06:59:08,196 INFO L226 Difference]: Without dead ends: 9147 [2021-06-05 06:59:08,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 619.3ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:59:08,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9147 states. [2021-06-05 06:59:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9147 to 3083. [2021-06-05 06:59:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3082 states have (on average 3.562621674237508) internal successors, (10980), 3082 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 10980 transitions. [2021-06-05 06:59:08,298 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 10980 transitions. Word has length 28 [2021-06-05 06:59:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:08,298 INFO L482 AbstractCegarLoop]: Abstraction has 3083 states and 10980 transitions. [2021-06-05 06:59:08,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 10980 transitions. [2021-06-05 06:59:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:08,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:08,302 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:08,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3525 [2021-06-05 06:59:08,503 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:08,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:08,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2125990737, now seen corresponding path program 75 times [2021-06-05 06:59:08,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:08,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400150893] [2021-06-05 06:59:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:08,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:08,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400150893] [2021-06-05 06:59:08,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400150893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:08,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259806459] [2021-06-05 06:59:08,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:08,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:08,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:08,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:08,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259806459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:08,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:08,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:59:08,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332436740] [2021-06-05 06:59:08,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:08,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:08,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:08,657 INFO L87 Difference]: Start difference. First operand 3083 states and 10980 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:09,619 INFO L93 Difference]: Finished difference Result 8583 states and 27105 transitions. [2021-06-05 06:59:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:59:09,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:09,631 INFO L225 Difference]: With dead ends: 8583 [2021-06-05 06:59:09,632 INFO L226 Difference]: Without dead ends: 8583 [2021-06-05 06:59:09,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:59:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2021-06-05 06:59:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 3103. [2021-06-05 06:59:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.5660863958736297) internal successors, (11062), 3102 states have internal predecessors, (11062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 11062 transitions. [2021-06-05 06:59:09,714 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 11062 transitions. Word has length 28 [2021-06-05 06:59:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:09,714 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 11062 transitions. [2021-06-05 06:59:09,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:09,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 11062 transitions. [2021-06-05 06:59:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:09,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:09,718 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:09,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3526 [2021-06-05 06:59:09,918 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1053673763, now seen corresponding path program 76 times [2021-06-05 06:59:09,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:09,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568829973] [2021-06-05 06:59:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:09,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:09,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568829973] [2021-06-05 06:59:09,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568829973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:09,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402431577] [2021-06-05 06:59:09,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:09,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:09,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:09,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:09,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:10,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402431577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:10,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:10,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:59:10,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196232847] [2021-06-05 06:59:10,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:10,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:10,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:10,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:10,067 INFO L87 Difference]: Start difference. First operand 3103 states and 11062 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:10,978 INFO L93 Difference]: Finished difference Result 8084 states and 25895 transitions. [2021-06-05 06:59:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:59:10,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:10,991 INFO L225 Difference]: With dead ends: 8084 [2021-06-05 06:59:10,991 INFO L226 Difference]: Without dead ends: 8076 [2021-06-05 06:59:10,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 521.7ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:59:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-05 06:59:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 3085. [2021-06-05 06:59:11,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.5619325551232164) internal successors, (10985), 3084 states have internal predecessors, (10985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 10985 transitions. [2021-06-05 06:59:11,080 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 10985 transitions. Word has length 28 [2021-06-05 06:59:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:11,080 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 10985 transitions. [2021-06-05 06:59:11,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 10985 transitions. [2021-06-05 06:59:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:11,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:11,085 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:11,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3527,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:11,289 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:11,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1235475809, now seen corresponding path program 77 times [2021-06-05 06:59:11,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:11,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975366919] [2021-06-05 06:59:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:11,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:11,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975366919] [2021-06-05 06:59:11,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975366919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:11,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447479734] [2021-06-05 06:59:11,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:11,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:59:11,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:11,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:11,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:11,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447479734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:11,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:11,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:59:11,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724580851] [2021-06-05 06:59:11,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:11,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:11,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:11,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:11,482 INFO L87 Difference]: Start difference. First operand 3085 states and 10985 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:12,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:12,515 INFO L93 Difference]: Finished difference Result 8010 states and 25668 transitions. [2021-06-05 06:59:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 06:59:12,516 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:12,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:12,527 INFO L225 Difference]: With dead ends: 8010 [2021-06-05 06:59:12,527 INFO L226 Difference]: Without dead ends: 8010 [2021-06-05 06:59:12,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:59:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2021-06-05 06:59:12,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 3101. [2021-06-05 06:59:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.5641935483870966) internal successors, (11049), 3100 states have internal predecessors, (11049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:12,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 11049 transitions. [2021-06-05 06:59:12,612 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 11049 transitions. Word has length 28 [2021-06-05 06:59:12,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:12,612 INFO L482 AbstractCegarLoop]: Abstraction has 3101 states and 11049 transitions. [2021-06-05 06:59:12,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:12,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 11049 transitions. [2021-06-05 06:59:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:12,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:12,616 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:12,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3528 [2021-06-05 06:59:12,817 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:12,817 INFO L82 PathProgramCache]: Analyzing trace with hash 180098415, now seen corresponding path program 78 times [2021-06-05 06:59:12,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:12,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443187746] [2021-06-05 06:59:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:12,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:12,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443187746] [2021-06-05 06:59:12,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443187746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:12,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138634879] [2021-06-05 06:59:12,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:12,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:59:12,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:12,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:12,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:12,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138634879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:12,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:12,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:59:12,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089993562] [2021-06-05 06:59:12,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:12,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:12,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:12,972 INFO L87 Difference]: Start difference. First operand 3101 states and 11049 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:13,973 INFO L93 Difference]: Finished difference Result 7678 states and 24884 transitions. [2021-06-05 06:59:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:59:13,974 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:13,986 INFO L225 Difference]: With dead ends: 7678 [2021-06-05 06:59:13,986 INFO L226 Difference]: Without dead ends: 7670 [2021-06-05 06:59:13,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 534.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:59:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7670 states. [2021-06-05 06:59:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7670 to 2858. [2021-06-05 06:59:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2857 states have (on average 3.4816240812040604) internal successors, (9947), 2857 states have internal predecessors, (9947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 9947 transitions. [2021-06-05 06:59:14,073 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 9947 transitions. Word has length 28 [2021-06-05 06:59:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:14,073 INFO L482 AbstractCegarLoop]: Abstraction has 2858 states and 9947 transitions. [2021-06-05 06:59:14,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 9947 transitions. [2021-06-05 06:59:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:14,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:14,076 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:14,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3529 [2021-06-05 06:59:14,277 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:14,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:14,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1618231897, now seen corresponding path program 79 times [2021-06-05 06:59:14,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:14,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609780908] [2021-06-05 06:59:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:14,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:14,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609780908] [2021-06-05 06:59:14,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609780908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:14,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955352667] [2021-06-05 06:59:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:14,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:14,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:14,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955352667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:14,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:14,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:59:14,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042661208] [2021-06-05 06:59:14,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:14,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:14,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:14,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:14,441 INFO L87 Difference]: Start difference. First operand 2858 states and 9947 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:15,327 INFO L93 Difference]: Finished difference Result 5875 states and 18762 transitions. [2021-06-05 06:59:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:59:15,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:15,336 INFO L225 Difference]: With dead ends: 5875 [2021-06-05 06:59:15,336 INFO L226 Difference]: Without dead ends: 5875 [2021-06-05 06:59:15,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 536.3ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:59:15,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2021-06-05 06:59:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 2870. [2021-06-05 06:59:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2869 states have (on average 3.480306727082607) internal successors, (9985), 2869 states have internal predecessors, (9985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 9985 transitions. [2021-06-05 06:59:15,395 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 9985 transitions. Word has length 28 [2021-06-05 06:59:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:15,395 INFO L482 AbstractCegarLoop]: Abstraction has 2870 states and 9985 transitions. [2021-06-05 06:59:15,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 9985 transitions. [2021-06-05 06:59:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:15,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:15,399 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:15,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3530,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:15,599 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:15,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:15,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1792117207, now seen corresponding path program 80 times [2021-06-05 06:59:15,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:15,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014069125] [2021-06-05 06:59:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:15,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:15,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014069125] [2021-06-05 06:59:15,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014069125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:15,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81876059] [2021-06-05 06:59:15,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:15,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:15,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:15,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:15,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:15,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81876059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:15,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:15,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:15,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809745220] [2021-06-05 06:59:15,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:15,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:15,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:15,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:15,791 INFO L87 Difference]: Start difference. First operand 2870 states and 9985 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:16,943 INFO L93 Difference]: Finished difference Result 6654 states and 20757 transitions. [2021-06-05 06:59:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:59:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:16,954 INFO L225 Difference]: With dead ends: 6654 [2021-06-05 06:59:16,954 INFO L226 Difference]: Without dead ends: 6654 [2021-06-05 06:59:16,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 715.4ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:59:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-06-05 06:59:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 2936. [2021-06-05 06:59:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 3.475979557069847) internal successors, (10202), 2935 states have internal predecessors, (10202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:17,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 10202 transitions. [2021-06-05 06:59:17,021 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 10202 transitions. Word has length 28 [2021-06-05 06:59:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:17,021 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 10202 transitions. [2021-06-05 06:59:17,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 10202 transitions. [2021-06-05 06:59:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:17,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:17,025 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:17,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:17,225 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1447472695, now seen corresponding path program 81 times [2021-06-05 06:59:17,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:17,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864171476] [2021-06-05 06:59:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:17,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:17,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864171476] [2021-06-05 06:59:17,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864171476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:17,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506320463] [2021-06-05 06:59:17,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:17,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:59:17,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:17,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506320463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:17,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:17,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:17,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282701984] [2021-06-05 06:59:17,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:17,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:17,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:17,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:17,395 INFO L87 Difference]: Start difference. First operand 2936 states and 10202 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:18,508 INFO L93 Difference]: Finished difference Result 6217 states and 19611 transitions. [2021-06-05 06:59:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:59:18,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:18,517 INFO L225 Difference]: With dead ends: 6217 [2021-06-05 06:59:18,517 INFO L226 Difference]: Without dead ends: 6213 [2021-06-05 06:59:18,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:59:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2021-06-05 06:59:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 2862. [2021-06-05 06:59:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.471513456833275) internal successors, (9932), 2861 states have internal predecessors, (9932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9932 transitions. [2021-06-05 06:59:18,577 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9932 transitions. Word has length 28 [2021-06-05 06:59:18,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:18,577 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9932 transitions. [2021-06-05 06:59:18,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9932 transitions. [2021-06-05 06:59:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:18,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:18,580 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:18,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3532,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:18,781 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash 193360559, now seen corresponding path program 68 times [2021-06-05 06:59:18,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:18,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23608535] [2021-06-05 06:59:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:18,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:18,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23608535] [2021-06-05 06:59:18,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23608535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:18,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484571646] [2021-06-05 06:59:18,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:18,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:18,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:18,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:18,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484571646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:18,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:18,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:18,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133486402] [2021-06-05 06:59:18,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:18,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:18,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:18,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:18,930 INFO L87 Difference]: Start difference. First operand 2862 states and 9932 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:19,521 INFO L93 Difference]: Finished difference Result 5353 states and 17165 transitions. [2021-06-05 06:59:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:59:19,521 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:19,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:19,529 INFO L225 Difference]: With dead ends: 5353 [2021-06-05 06:59:19,529 INFO L226 Difference]: Without dead ends: 5353 [2021-06-05 06:59:19,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:59:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-06-05 06:59:19,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 2862. [2021-06-05 06:59:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.473610625655365) internal successors, (9938), 2861 states have internal predecessors, (9938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9938 transitions. [2021-06-05 06:59:19,576 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9938 transitions. Word has length 28 [2021-06-05 06:59:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:19,577 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9938 transitions. [2021-06-05 06:59:19,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:19,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9938 transitions. [2021-06-05 06:59:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:19,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:19,580 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:19,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3533 [2021-06-05 06:59:19,780 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:19,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1418439203, now seen corresponding path program 69 times [2021-06-05 06:59:19,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:19,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750973655] [2021-06-05 06:59:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:19,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:19,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750973655] [2021-06-05 06:59:19,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750973655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:19,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536317418] [2021-06-05 06:59:19,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:19,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:59:19,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:19,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:19,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:19,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536317418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:19,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:19,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:19,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889360441] [2021-06-05 06:59:19,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:19,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:19,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:19,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:19,947 INFO L87 Difference]: Start difference. First operand 2862 states and 9938 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:20,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:20,715 INFO L93 Difference]: Finished difference Result 5672 states and 18078 transitions. [2021-06-05 06:59:20,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:59:20,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:20,724 INFO L225 Difference]: With dead ends: 5672 [2021-06-05 06:59:20,724 INFO L226 Difference]: Without dead ends: 5672 [2021-06-05 06:59:20,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:59:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2021-06-05 06:59:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 2853. [2021-06-05 06:59:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 3.473702664796634) internal successors, (9907), 2852 states have internal predecessors, (9907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 9907 transitions. [2021-06-05 06:59:20,781 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 9907 transitions. Word has length 28 [2021-06-05 06:59:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:20,781 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 9907 transitions. [2021-06-05 06:59:20,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 9907 transitions. [2021-06-05 06:59:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:20,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:20,785 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:20,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3534,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:20,985 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1649978851, now seen corresponding path program 70 times [2021-06-05 06:59:20,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:20,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869899874] [2021-06-05 06:59:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:21,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:21,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869899874] [2021-06-05 06:59:21,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869899874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:21,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329453802] [2021-06-05 06:59:21,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:21,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:21,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:21,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:21,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:21,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329453802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:21,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:21,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:21,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650383510] [2021-06-05 06:59:21,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:21,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:21,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:21,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:21,132 INFO L87 Difference]: Start difference. First operand 2853 states and 9907 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:22,015 INFO L93 Difference]: Finished difference Result 6160 states and 19384 transitions. [2021-06-05 06:59:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:59:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:22,023 INFO L225 Difference]: With dead ends: 6160 [2021-06-05 06:59:22,023 INFO L226 Difference]: Without dead ends: 6160 [2021-06-05 06:59:22,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 535.1ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:59:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-06-05 06:59:22,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 2913. [2021-06-05 06:59:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4701236263736264) internal successors, (10105), 2912 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10105 transitions. [2021-06-05 06:59:22,079 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10105 transitions. Word has length 28 [2021-06-05 06:59:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:22,079 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10105 transitions. [2021-06-05 06:59:22,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10105 transitions. [2021-06-05 06:59:22,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:22,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:22,082 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:22,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3535 [2021-06-05 06:59:22,283 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:22,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:22,283 INFO L82 PathProgramCache]: Analyzing trace with hash 707808605, now seen corresponding path program 71 times [2021-06-05 06:59:22,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:22,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192724199] [2021-06-05 06:59:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:22,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:22,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192724199] [2021-06-05 06:59:22,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192724199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:22,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494687107] [2021-06-05 06:59:22,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:22,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:59:22,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:22,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:22,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494687107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:22,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:22,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 06:59:22,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890012743] [2021-06-05 06:59:22,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:22,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:22,443 INFO L87 Difference]: Start difference. First operand 2913 states and 10105 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:23,001 INFO L93 Difference]: Finished difference Result 6832 states and 22884 transitions. [2021-06-05 06:59:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:59:23,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:23,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:23,013 INFO L225 Difference]: With dead ends: 6832 [2021-06-05 06:59:23,013 INFO L226 Difference]: Without dead ends: 6832 [2021-06-05 06:59:23,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:59:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2021-06-05 06:59:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 4173. [2021-06-05 06:59:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 3.5884467881112174) internal successors, (14971), 4172 states have internal predecessors, (14971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 14971 transitions. [2021-06-05 06:59:23,100 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 14971 transitions. Word has length 28 [2021-06-05 06:59:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:23,100 INFO L482 AbstractCegarLoop]: Abstraction has 4173 states and 14971 transitions. [2021-06-05 06:59:23,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 14971 transitions. [2021-06-05 06:59:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:23,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:23,106 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:23,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3536,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:23,307 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash -703859107, now seen corresponding path program 72 times [2021-06-05 06:59:23,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:23,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647734662] [2021-06-05 06:59:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:23,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:23,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647734662] [2021-06-05 06:59:23,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647734662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:23,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652093544] [2021-06-05 06:59:23,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:23,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:59:23,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:23,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:23,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:23,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652093544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:23,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:23,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:23,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899215024] [2021-06-05 06:59:23,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:23,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:23,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:23,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:23,449 INFO L87 Difference]: Start difference. First operand 4173 states and 14971 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:24,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:24,301 INFO L93 Difference]: Finished difference Result 7512 states and 25338 transitions. [2021-06-05 06:59:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:59:24,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:24,313 INFO L225 Difference]: With dead ends: 7512 [2021-06-05 06:59:24,313 INFO L226 Difference]: Without dead ends: 7508 [2021-06-05 06:59:24,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:59:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-06-05 06:59:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 4065. [2021-06-05 06:59:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 3.597194881889764) internal successors, (14619), 4064 states have internal predecessors, (14619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 14619 transitions. [2021-06-05 06:59:24,389 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 14619 transitions. Word has length 28 [2021-06-05 06:59:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:24,389 INFO L482 AbstractCegarLoop]: Abstraction has 4065 states and 14619 transitions. [2021-06-05 06:59:24,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 14619 transitions. [2021-06-05 06:59:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:24,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:24,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:24,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3537,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:24,594 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:24,594 INFO L82 PathProgramCache]: Analyzing trace with hash 325457475, now seen corresponding path program 82 times [2021-06-05 06:59:24,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:24,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710369403] [2021-06-05 06:59:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:24,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:24,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710369403] [2021-06-05 06:59:24,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710369403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:24,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587736876] [2021-06-05 06:59:24,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:24,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:24,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:24,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:24,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587736876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:24,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:24,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:59:24,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696117982] [2021-06-05 06:59:24,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:24,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:24,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:24,737 INFO L87 Difference]: Start difference. First operand 4065 states and 14619 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:25,623 INFO L93 Difference]: Finished difference Result 8298 states and 27746 transitions. [2021-06-05 06:59:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:59:25,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:25,638 INFO L225 Difference]: With dead ends: 8298 [2021-06-05 06:59:25,638 INFO L226 Difference]: Without dead ends: 8289 [2021-06-05 06:59:25,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:59:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-06-05 06:59:25,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 4502. [2021-06-05 06:59:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 3.688735836480782) internal successors, (16603), 4501 states have internal predecessors, (16603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 16603 transitions. [2021-06-05 06:59:25,777 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 16603 transitions. Word has length 28 [2021-06-05 06:59:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:25,777 INFO L482 AbstractCegarLoop]: Abstraction has 4502 states and 16603 transitions. [2021-06-05 06:59:25,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 16603 transitions. [2021-06-05 06:59:25,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:25,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:25,784 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:25,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3538 [2021-06-05 06:59:25,985 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:25,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1928168421, now seen corresponding path program 83 times [2021-06-05 06:59:25,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:25,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341051918] [2021-06-05 06:59:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:26,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:26,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341051918] [2021-06-05 06:59:26,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341051918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:26,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128483552] [2021-06-05 06:59:26,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:26,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:59:26,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:26,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:26,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128483552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:26,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:26,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:59:26,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512024307] [2021-06-05 06:59:26,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:26,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:26,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:26,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:26,139 INFO L87 Difference]: Start difference. First operand 4502 states and 16603 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:26,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:27,000 INFO L93 Difference]: Finished difference Result 8567 states and 28576 transitions. [2021-06-05 06:59:27,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:59:27,000 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:27,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:27,014 INFO L225 Difference]: With dead ends: 8567 [2021-06-05 06:59:27,015 INFO L226 Difference]: Without dead ends: 8567 [2021-06-05 06:59:27,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:59:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2021-06-05 06:59:27,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 4520. [2021-06-05 06:59:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 3.677362248285019) internal successors, (16618), 4519 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 16618 transitions. [2021-06-05 06:59:27,112 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 16618 transitions. Word has length 28 [2021-06-05 06:59:27,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:27,112 INFO L482 AbstractCegarLoop]: Abstraction has 4520 states and 16618 transitions. [2021-06-05 06:59:27,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 16618 transitions. [2021-06-05 06:59:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:27,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:27,118 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:27,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3539,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:27,318 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:27,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1163392585, now seen corresponding path program 84 times [2021-06-05 06:59:27,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:27,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245801031] [2021-06-05 06:59:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:27,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:27,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245801031] [2021-06-05 06:59:27,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245801031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:27,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13528560] [2021-06-05 06:59:27,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:27,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:59:27,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:27,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:27,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13528560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:27,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:27,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:59:27,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805879787] [2021-06-05 06:59:27,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:59:27,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:27,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:59:27,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:59:27,443 INFO L87 Difference]: Start difference. First operand 4520 states and 16618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:27,890 INFO L93 Difference]: Finished difference Result 8001 states and 28114 transitions. [2021-06-05 06:59:27,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:59:27,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:27,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:27,902 INFO L225 Difference]: With dead ends: 8001 [2021-06-05 06:59:27,902 INFO L226 Difference]: Without dead ends: 7918 [2021-06-05 06:59:27,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:59:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7918 states. [2021-06-05 06:59:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7918 to 5964. [2021-06-05 06:59:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5964 states, 5963 states have (on average 3.7450947509642796) internal successors, (22332), 5963 states have internal predecessors, (22332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 22332 transitions. [2021-06-05 06:59:28,003 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 22332 transitions. Word has length 28 [2021-06-05 06:59:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:28,003 INFO L482 AbstractCegarLoop]: Abstraction has 5964 states and 22332 transitions. [2021-06-05 06:59:28,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 22332 transitions. [2021-06-05 06:59:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:28,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:28,012 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:28,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3540 [2021-06-05 06:59:28,213 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1923559731, now seen corresponding path program 85 times [2021-06-05 06:59:28,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:28,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656869841] [2021-06-05 06:59:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:28,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:28,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656869841] [2021-06-05 06:59:28,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656869841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:28,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106798971] [2021-06-05 06:59:28,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:59:28,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:28,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106798971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:28,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:28,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 06:59:28,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499205248] [2021-06-05 06:59:28,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:59:28,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:28,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:59:28,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:59:28,322 INFO L87 Difference]: Start difference. First operand 5964 states and 22332 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:28,509 INFO L93 Difference]: Finished difference Result 8265 states and 28982 transitions. [2021-06-05 06:59:28,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:59:28,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:28,523 INFO L225 Difference]: With dead ends: 8265 [2021-06-05 06:59:28,523 INFO L226 Difference]: Without dead ends: 8265 [2021-06-05 06:59:28,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:59:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2021-06-05 06:59:28,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 6071. [2021-06-05 06:59:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6071 states, 6070 states have (on average 3.7255354200988466) internal successors, (22614), 6070 states have internal predecessors, (22614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6071 states to 6071 states and 22614 transitions. [2021-06-05 06:59:28,631 INFO L78 Accepts]: Start accepts. Automaton has 6071 states and 22614 transitions. Word has length 28 [2021-06-05 06:59:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:28,631 INFO L482 AbstractCegarLoop]: Abstraction has 6071 states and 22614 transitions. [2021-06-05 06:59:28,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 6071 states and 22614 transitions. [2021-06-05 06:59:28,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:28,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:28,640 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:28,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3541,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:28,841 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:28,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:28,841 INFO L82 PathProgramCache]: Analyzing trace with hash -993359987, now seen corresponding path program 86 times [2021-06-05 06:59:28,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:28,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809567376] [2021-06-05 06:59:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:28,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:28,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809567376] [2021-06-05 06:59:28,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809567376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:28,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213157878] [2021-06-05 06:59:28,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:28,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:28,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:28,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213157878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:28,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:28,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:59:28,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994649045] [2021-06-05 06:59:28,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:28,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:28,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:28,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:28,976 INFO L87 Difference]: Start difference. First operand 6071 states and 22614 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:29,716 INFO L93 Difference]: Finished difference Result 12605 states and 43798 transitions. [2021-06-05 06:59:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:59:29,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:29,739 INFO L225 Difference]: With dead ends: 12605 [2021-06-05 06:59:29,739 INFO L226 Difference]: Without dead ends: 12605 [2021-06-05 06:59:29,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:59:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12605 states. [2021-06-05 06:59:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12605 to 6726. [2021-06-05 06:59:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6726 states, 6725 states have (on average 3.7414126394052043) internal successors, (25161), 6725 states have internal predecessors, (25161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6726 states to 6726 states and 25161 transitions. [2021-06-05 06:59:29,885 INFO L78 Accepts]: Start accepts. Automaton has 6726 states and 25161 transitions. Word has length 28 [2021-06-05 06:59:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:29,885 INFO L482 AbstractCegarLoop]: Abstraction has 6726 states and 25161 transitions. [2021-06-05 06:59:29,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6726 states and 25161 transitions. [2021-06-05 06:59:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:29,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:29,894 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:30,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:30,095 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:30,095 INFO L82 PathProgramCache]: Analyzing trace with hash 909319465, now seen corresponding path program 87 times [2021-06-05 06:59:30,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:30,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115695385] [2021-06-05 06:59:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:30,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:30,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115695385] [2021-06-05 06:59:30,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115695385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:30,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804859644] [2021-06-05 06:59:30,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:30,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:30,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:30,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:30,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:30,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804859644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:30,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:30,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 06:59:30,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514415055] [2021-06-05 06:59:30,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:59:30,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:30,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:59:30,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:59:30,224 INFO L87 Difference]: Start difference. First operand 6726 states and 25161 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:30,905 INFO L93 Difference]: Finished difference Result 12718 states and 44233 transitions. [2021-06-05 06:59:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:59:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:30,930 INFO L225 Difference]: With dead ends: 12718 [2021-06-05 06:59:30,930 INFO L226 Difference]: Without dead ends: 12718 [2021-06-05 06:59:30,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 382.8ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:59:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-06-05 06:59:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 6962. [2021-06-05 06:59:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6961 states have (on average 3.7214480678063495) internal successors, (25905), 6961 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 25905 transitions. [2021-06-05 06:59:31,128 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 25905 transitions. Word has length 28 [2021-06-05 06:59:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:31,128 INFO L482 AbstractCegarLoop]: Abstraction has 6962 states and 25905 transitions. [2021-06-05 06:59:31,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 25905 transitions. [2021-06-05 06:59:31,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:31,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:31,138 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:31,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:31,339 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:31,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:31,339 INFO L82 PathProgramCache]: Analyzing trace with hash -173703191, now seen corresponding path program 88 times [2021-06-05 06:59:31,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:31,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429503004] [2021-06-05 06:59:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:31,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:31,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429503004] [2021-06-05 06:59:31,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429503004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:31,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334024153] [2021-06-05 06:59:31,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:31,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:31,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:31,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:31,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:31,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334024153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:31,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:31,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:59:31,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950472051] [2021-06-05 06:59:31,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:59:31,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:31,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:59:31,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:59:31,459 INFO L87 Difference]: Start difference. First operand 6962 states and 25905 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:31,822 INFO L93 Difference]: Finished difference Result 9470 states and 33921 transitions. [2021-06-05 06:59:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:59:31,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:31,840 INFO L225 Difference]: With dead ends: 9470 [2021-06-05 06:59:31,840 INFO L226 Difference]: Without dead ends: 9440 [2021-06-05 06:59:31,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:59:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9440 states. [2021-06-05 06:59:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9440 to 7814. [2021-06-05 06:59:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7814 states, 7813 states have (on average 3.749904006143607) internal successors, (29298), 7813 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 29298 transitions. [2021-06-05 06:59:31,987 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 29298 transitions. Word has length 28 [2021-06-05 06:59:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:31,987 INFO L482 AbstractCegarLoop]: Abstraction has 7814 states and 29298 transitions. [2021-06-05 06:59:31,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 29298 transitions. [2021-06-05 06:59:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:31,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:31,998 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:32,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3544,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:32,205 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:32,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1297374927, now seen corresponding path program 89 times [2021-06-05 06:59:32,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:32,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541139297] [2021-06-05 06:59:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:32,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:32,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541139297] [2021-06-05 06:59:32,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541139297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:32,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801163819] [2021-06-05 06:59:32,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:32,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:59:32,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:32,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:32,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:32,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801163819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:32,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:32,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:59:32,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958878474] [2021-06-05 06:59:32,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:59:32,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:32,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:59:32,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:59:32,323 INFO L87 Difference]: Start difference. First operand 7814 states and 29298 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:32,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:32,671 INFO L93 Difference]: Finished difference Result 10065 states and 35894 transitions. [2021-06-05 06:59:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:59:32,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:32,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:32,689 INFO L225 Difference]: With dead ends: 10065 [2021-06-05 06:59:32,689 INFO L226 Difference]: Without dead ends: 10065 [2021-06-05 06:59:32,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:59:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10065 states. [2021-06-05 06:59:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10065 to 7854. [2021-06-05 06:59:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7853 states have (on average 3.7459569591239017) internal successors, (29417), 7853 states have internal predecessors, (29417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 29417 transitions. [2021-06-05 06:59:32,865 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 29417 transitions. Word has length 28 [2021-06-05 06:59:32,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:32,865 INFO L482 AbstractCegarLoop]: Abstraction has 7854 states and 29417 transitions. [2021-06-05 06:59:32,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:32,865 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 29417 transitions. [2021-06-05 06:59:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:32,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:32,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:33,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3545,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:33,077 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:33,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:33,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1855439209, now seen corresponding path program 90 times [2021-06-05 06:59:33,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:33,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129145792] [2021-06-05 06:59:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:33,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:33,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129145792] [2021-06-05 06:59:33,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129145792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:33,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857353430] [2021-06-05 06:59:33,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:33,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:59:33,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:33,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:33,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:33,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857353430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:33,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:33,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 06:59:33,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273031891] [2021-06-05 06:59:33,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:59:33,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:59:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:59:33,199 INFO L87 Difference]: Start difference. First operand 7854 states and 29417 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:33,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:33,835 INFO L93 Difference]: Finished difference Result 13425 states and 47598 transitions. [2021-06-05 06:59:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:59:33,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:33,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:33,861 INFO L225 Difference]: With dead ends: 13425 [2021-06-05 06:59:33,861 INFO L226 Difference]: Without dead ends: 13421 [2021-06-05 06:59:33,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:59:33,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2021-06-05 06:59:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 7752. [2021-06-05 06:59:34,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7752 states, 7751 states have (on average 3.7497097148755) internal successors, (29064), 7751 states have internal predecessors, (29064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:34,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7752 states to 7752 states and 29064 transitions. [2021-06-05 06:59:34,088 INFO L78 Accepts]: Start accepts. Automaton has 7752 states and 29064 transitions. Word has length 28 [2021-06-05 06:59:34,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:34,088 INFO L482 AbstractCegarLoop]: Abstraction has 7752 states and 29064 transitions. [2021-06-05 06:59:34,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:34,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7752 states and 29064 transitions. [2021-06-05 06:59:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:34,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:34,100 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:34,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3546,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:34,300 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:34,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:34,301 INFO L82 PathProgramCache]: Analyzing trace with hash 812772317, now seen corresponding path program 91 times [2021-06-05 06:59:34,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:34,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226052392] [2021-06-05 06:59:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:34,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:34,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226052392] [2021-06-05 06:59:34,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226052392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:34,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602304917] [2021-06-05 06:59:34,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:34,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:34,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:34,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602304917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:34,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:34,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:59:34,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258428532] [2021-06-05 06:59:34,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:59:34,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:34,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:59:34,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:59:34,439 INFO L87 Difference]: Start difference. First operand 7752 states and 29064 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:34,932 INFO L93 Difference]: Finished difference Result 10276 states and 36673 transitions. [2021-06-05 06:59:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:59:34,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:34,952 INFO L225 Difference]: With dead ends: 10276 [2021-06-05 06:59:34,952 INFO L226 Difference]: Without dead ends: 10276 [2021-06-05 06:59:34,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:59:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10276 states. [2021-06-05 06:59:35,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10276 to 7683. [2021-06-05 06:59:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.743686539963551) internal successors, (28759), 7682 states have internal predecessors, (28759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28759 transitions. [2021-06-05 06:59:35,110 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28759 transitions. Word has length 28 [2021-06-05 06:59:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:35,110 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28759 transitions. [2021-06-05 06:59:35,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28759 transitions. [2021-06-05 06:59:35,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:35,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:35,122 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:35,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3547 [2021-06-05 06:59:35,322 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:35,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:35,323 INFO L82 PathProgramCache]: Analyzing trace with hash 933737069, now seen corresponding path program 92 times [2021-06-05 06:59:35,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:35,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118570329] [2021-06-05 06:59:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:35,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:35,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118570329] [2021-06-05 06:59:35,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118570329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:35,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207678189] [2021-06-05 06:59:35,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:35,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:35,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:35,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:35,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207678189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:35,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:35,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:59:35,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358228383] [2021-06-05 06:59:35,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:35,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:35,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:35,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:35,452 INFO L87 Difference]: Start difference. First operand 7683 states and 28759 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:36,149 INFO L93 Difference]: Finished difference Result 13291 states and 47039 transitions. [2021-06-05 06:59:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:59:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:36,173 INFO L225 Difference]: With dead ends: 13291 [2021-06-05 06:59:36,174 INFO L226 Difference]: Without dead ends: 13279 [2021-06-05 06:59:36,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:59:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13279 states. [2021-06-05 06:59:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13279 to 7683. [2021-06-05 06:59:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.7431658422285863) internal successors, (28755), 7682 states have internal predecessors, (28755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28755 transitions. [2021-06-05 06:59:36,378 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28755 transitions. Word has length 28 [2021-06-05 06:59:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:36,378 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28755 transitions. [2021-06-05 06:59:36,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28755 transitions. [2021-06-05 06:59:36,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:36,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:36,389 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:36,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3548,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:36,590 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:36,590 INFO L82 PathProgramCache]: Analyzing trace with hash -306445935, now seen corresponding path program 93 times [2021-06-05 06:59:36,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:36,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586234660] [2021-06-05 06:59:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:36,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:36,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586234660] [2021-06-05 06:59:36,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586234660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:36,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055293307] [2021-06-05 06:59:36,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:36,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:36,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:36,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:36,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:36,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055293307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:36,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:36,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:59:36,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529490880] [2021-06-05 06:59:36,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:36,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:36,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:36,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:36,740 INFO L87 Difference]: Start difference. First operand 7683 states and 28755 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:37,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:37,931 INFO L93 Difference]: Finished difference Result 20069 states and 69965 transitions. [2021-06-05 06:59:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 06:59:37,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:37,970 INFO L225 Difference]: With dead ends: 20069 [2021-06-05 06:59:37,970 INFO L226 Difference]: Without dead ends: 20069 [2021-06-05 06:59:37,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 735.8ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:59:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20069 states. [2021-06-05 06:59:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20069 to 10444. [2021-06-05 06:59:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10444 states, 10443 states have (on average 3.790577420281528) internal successors, (39585), 10443 states have internal predecessors, (39585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 39585 transitions. [2021-06-05 06:59:38,310 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 39585 transitions. Word has length 28 [2021-06-05 06:59:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:38,310 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 39585 transitions. [2021-06-05 06:59:38,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 39585 transitions. [2021-06-05 06:59:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:38,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:38,326 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:38,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3549,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:38,528 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:38,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:38,528 INFO L82 PathProgramCache]: Analyzing trace with hash 765871039, now seen corresponding path program 94 times [2021-06-05 06:59:38,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:38,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21000893] [2021-06-05 06:59:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:38,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:38,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21000893] [2021-06-05 06:59:38,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21000893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:38,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944795787] [2021-06-05 06:59:38,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:38,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:38,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:38,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:38,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944795787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:38,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:38,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:59:38,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233720743] [2021-06-05 06:59:38,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:38,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:38,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:38,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:38,664 INFO L87 Difference]: Start difference. First operand 10444 states and 39585 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:39,723 INFO L93 Difference]: Finished difference Result 19312 states and 67991 transitions. [2021-06-05 06:59:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:59:39,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:39,759 INFO L225 Difference]: With dead ends: 19312 [2021-06-05 06:59:39,759 INFO L226 Difference]: Without dead ends: 19300 [2021-06-05 06:59:39,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 620.6ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:59:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19300 states. [2021-06-05 06:59:40,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19300 to 10242. [2021-06-05 06:59:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10242 states, 10241 states have (on average 3.799043062200957) internal successors, (38906), 10241 states have internal predecessors, (38906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10242 states to 10242 states and 38906 transitions. [2021-06-05 06:59:40,111 INFO L78 Accepts]: Start accepts. Automaton has 10242 states and 38906 transitions. Word has length 28 [2021-06-05 06:59:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:40,111 INFO L482 AbstractCegarLoop]: Abstraction has 10242 states and 38906 transitions. [2021-06-05 06:59:40,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 10242 states and 38906 transitions. [2021-06-05 06:59:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:40,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:40,127 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:40,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3550 [2021-06-05 06:59:40,327 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2026707565, now seen corresponding path program 95 times [2021-06-05 06:59:40,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:40,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517030912] [2021-06-05 06:59:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:40,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:40,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517030912] [2021-06-05 06:59:40,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517030912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:40,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275912868] [2021-06-05 06:59:40,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:40,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:59:40,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:40,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:40,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275912868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:40,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:40,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:59:40,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292431249] [2021-06-05 06:59:40,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:40,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:40,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:40,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:40,467 INFO L87 Difference]: Start difference. First operand 10242 states and 38906 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:41,520 INFO L93 Difference]: Finished difference Result 19128 states and 67337 transitions. [2021-06-05 06:59:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:59:41,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:41,561 INFO L225 Difference]: With dead ends: 19128 [2021-06-05 06:59:41,561 INFO L226 Difference]: Without dead ends: 19092 [2021-06-05 06:59:41,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 588.5ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:59:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19092 states. [2021-06-05 06:59:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19092 to 10290. [2021-06-05 06:59:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10290 states, 10289 states have (on average 3.7970648265137528) internal successors, (39068), 10289 states have internal predecessors, (39068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10290 states to 10290 states and 39068 transitions. [2021-06-05 06:59:41,933 INFO L78 Accepts]: Start accepts. Automaton has 10290 states and 39068 transitions. Word has length 28 [2021-06-05 06:59:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:41,933 INFO L482 AbstractCegarLoop]: Abstraction has 10290 states and 39068 transitions. [2021-06-05 06:59:41,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 10290 states and 39068 transitions. [2021-06-05 06:59:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:41,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:41,950 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:42,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-06-05 06:59:42,151 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:42,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1595973395, now seen corresponding path program 96 times [2021-06-05 06:59:42,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:42,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953992362] [2021-06-05 06:59:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:42,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:42,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953992362] [2021-06-05 06:59:42,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953992362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:42,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187423872] [2021-06-05 06:59:42,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:42,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:59:42,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:42,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:42,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:42,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187423872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:42,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:42,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:59:42,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661041511] [2021-06-05 06:59:42,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:42,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:42,368 INFO L87 Difference]: Start difference. First operand 10290 states and 39068 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:43,876 INFO L93 Difference]: Finished difference Result 19050 states and 67176 transitions. [2021-06-05 06:59:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 06:59:43,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:43,909 INFO L225 Difference]: With dead ends: 19050 [2021-06-05 06:59:43,909 INFO L226 Difference]: Without dead ends: 19050 [2021-06-05 06:59:43,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 958.9ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 06:59:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19050 states. [2021-06-05 06:59:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19050 to 10488. [2021-06-05 06:59:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10488 states, 10487 states have (on average 3.787832554591399) internal successors, (39723), 10487 states have internal predecessors, (39723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10488 states to 10488 states and 39723 transitions. [2021-06-05 06:59:44,234 INFO L78 Accepts]: Start accepts. Automaton has 10488 states and 39723 transitions. Word has length 28 [2021-06-05 06:59:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:44,234 INFO L482 AbstractCegarLoop]: Abstraction has 10488 states and 39723 transitions. [2021-06-05 06:59:44,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 10488 states and 39723 transitions. [2021-06-05 06:59:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:44,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:44,249 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:44,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:44,451 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1643616507, now seen corresponding path program 97 times [2021-06-05 06:59:44,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:44,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087629408] [2021-06-05 06:59:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:44,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:44,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087629408] [2021-06-05 06:59:44,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087629408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:44,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776164884] [2021-06-05 06:59:44,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:44,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:44,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:44,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776164884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:44,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:44,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:59:44,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92862616] [2021-06-05 06:59:44,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:44,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:44,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:44,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:44,615 INFO L87 Difference]: Start difference. First operand 10488 states and 39723 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:45,891 INFO L93 Difference]: Finished difference Result 18660 states and 66098 transitions. [2021-06-05 06:59:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:59:45,891 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:45,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:45,928 INFO L225 Difference]: With dead ends: 18660 [2021-06-05 06:59:45,929 INFO L226 Difference]: Without dead ends: 18648 [2021-06-05 06:59:45,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 789.7ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:59:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-06-05 06:59:46,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 10366. [2021-06-05 06:59:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 3.7916063675832126) internal successors, (39300), 10365 states have internal predecessors, (39300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 39300 transitions. [2021-06-05 06:59:46,199 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 39300 transitions. Word has length 28 [2021-06-05 06:59:46,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:46,200 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 39300 transitions. [2021-06-05 06:59:46,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 39300 transitions. [2021-06-05 06:59:46,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:46,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:46,215 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:46,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:46,415 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:46,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1168215851, now seen corresponding path program 98 times [2021-06-05 06:59:46,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:46,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088527769] [2021-06-05 06:59:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:46,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:46,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088527769] [2021-06-05 06:59:46,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088527769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:46,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158212710] [2021-06-05 06:59:46,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:46,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:46,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:46,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:46,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:46,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158212710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:46,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:46,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 06:59:46,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780071163] [2021-06-05 06:59:46,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:46,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:46,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:46,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:46,564 INFO L87 Difference]: Start difference. First operand 10366 states and 39300 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:47,711 INFO L93 Difference]: Finished difference Result 17898 states and 64003 transitions. [2021-06-05 06:59:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:59:47,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:47,745 INFO L225 Difference]: With dead ends: 17898 [2021-06-05 06:59:47,745 INFO L226 Difference]: Without dead ends: 17862 [2021-06-05 06:59:47,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 628.2ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:59:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17862 states. [2021-06-05 06:59:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17862 to 10386. [2021-06-05 06:59:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10386 states, 10385 states have (on average 3.7906596051998074) internal successors, (39366), 10385 states have internal predecessors, (39366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10386 states to 10386 states and 39366 transitions. [2021-06-05 06:59:48,011 INFO L78 Accepts]: Start accepts. Automaton has 10386 states and 39366 transitions. Word has length 28 [2021-06-05 06:59:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:48,011 INFO L482 AbstractCegarLoop]: Abstraction has 10386 states and 39366 transitions. [2021-06-05 06:59:48,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 10386 states and 39366 transitions. [2021-06-05 06:59:48,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:48,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:48,026 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:48,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3554 [2021-06-05 06:59:48,226 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:48,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1708660749, now seen corresponding path program 99 times [2021-06-05 06:59:48,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:48,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746830924] [2021-06-05 06:59:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:48,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:48,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746830924] [2021-06-05 06:59:48,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746830924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:48,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702298417] [2021-06-05 06:59:48,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:48,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:59:48,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:48,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:48,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:48,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702298417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:48,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:48,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:48,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007530854] [2021-06-05 06:59:48,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:48,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:48,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:48,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:48,402 INFO L87 Difference]: Start difference. First operand 10386 states and 39366 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:49,803 INFO L93 Difference]: Finished difference Result 26075 states and 92737 transitions. [2021-06-05 06:59:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 06:59:49,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:49,862 INFO L225 Difference]: With dead ends: 26075 [2021-06-05 06:59:49,862 INFO L226 Difference]: Without dead ends: 26075 [2021-06-05 06:59:49,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 807.1ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 06:59:49,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26075 states. [2021-06-05 06:59:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26075 to 10692. [2021-06-05 06:59:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10692 states, 10691 states have (on average 3.8184454213824712) internal successors, (40823), 10691 states have internal predecessors, (40823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10692 states to 10692 states and 40823 transitions. [2021-06-05 06:59:50,179 INFO L78 Accepts]: Start accepts. Automaton has 10692 states and 40823 transitions. Word has length 28 [2021-06-05 06:59:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:50,179 INFO L482 AbstractCegarLoop]: Abstraction has 10692 states and 40823 transitions. [2021-06-05 06:59:50,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 10692 states and 40823 transitions. [2021-06-05 06:59:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:50,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:50,194 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:50,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:50,395 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:50,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1057401903, now seen corresponding path program 100 times [2021-06-05 06:59:50,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:50,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768376633] [2021-06-05 06:59:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:50,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:50,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768376633] [2021-06-05 06:59:50,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768376633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:50,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595812542] [2021-06-05 06:59:50,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:50,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:50,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:50,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:50,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:50,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595812542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:50,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:50,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:50,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115113824] [2021-06-05 06:59:50,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:50,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:50,561 INFO L87 Difference]: Start difference. First operand 10692 states and 40823 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:51,829 INFO L93 Difference]: Finished difference Result 25519 states and 91410 transitions. [2021-06-05 06:59:51,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:59:51,829 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:51,890 INFO L225 Difference]: With dead ends: 25519 [2021-06-05 06:59:51,891 INFO L226 Difference]: Without dead ends: 25519 [2021-06-05 06:59:51,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 773.4ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:59:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25519 states. [2021-06-05 06:59:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25519 to 10592. [2021-06-05 06:59:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.8053063922198094) internal successors, (40302), 10591 states have internal predecessors, (40302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40302 transitions. [2021-06-05 06:59:52,347 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40302 transitions. Word has length 28 [2021-06-05 06:59:52,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:52,347 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40302 transitions. [2021-06-05 06:59:52,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:52,347 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40302 transitions. [2021-06-05 06:59:52,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:52,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:52,363 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:52,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3556,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:52,563 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:52,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1158271565, now seen corresponding path program 101 times [2021-06-05 06:59:52,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:52,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551213768] [2021-06-05 06:59:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:52,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:52,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551213768] [2021-06-05 06:59:52,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551213768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:52,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376907164] [2021-06-05 06:59:52,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:52,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:59:52,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:52,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376907164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:52,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:52,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:59:52,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954502875] [2021-06-05 06:59:52,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:52,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:52,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:52,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:52,750 INFO L87 Difference]: Start difference. First operand 10592 states and 40302 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:53,647 INFO L93 Difference]: Finished difference Result 20262 states and 72808 transitions. [2021-06-05 06:59:53,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:59:53,648 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:53,687 INFO L225 Difference]: With dead ends: 20262 [2021-06-05 06:59:53,687 INFO L226 Difference]: Without dead ends: 20262 [2021-06-05 06:59:53,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 496.5ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:59:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20262 states. [2021-06-05 06:59:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20262 to 10601. [2021-06-05 06:59:53,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10601 states, 10600 states have (on average 3.8042452830188678) internal successors, (40325), 10600 states have internal predecessors, (40325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10601 states to 10601 states and 40325 transitions. [2021-06-05 06:59:53,943 INFO L78 Accepts]: Start accepts. Automaton has 10601 states and 40325 transitions. Word has length 28 [2021-06-05 06:59:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:53,943 INFO L482 AbstractCegarLoop]: Abstraction has 10601 states and 40325 transitions. [2021-06-05 06:59:53,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 10601 states and 40325 transitions. [2021-06-05 06:59:53,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:53,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:53,959 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:54,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:54,159 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:54,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:54,159 INFO L82 PathProgramCache]: Analyzing trace with hash 545777745, now seen corresponding path program 102 times [2021-06-05 06:59:54,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:54,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630992227] [2021-06-05 06:59:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:54,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:54,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630992227] [2021-06-05 06:59:54,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630992227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:54,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949276174] [2021-06-05 06:59:54,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:54,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:59:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:54,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:54,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949276174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:54,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:54,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:59:54,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048470275] [2021-06-05 06:59:54,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:54,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:54,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:54,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:54,323 INFO L87 Difference]: Start difference. First operand 10601 states and 40325 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:55,170 INFO L93 Difference]: Finished difference Result 18811 states and 68168 transitions. [2021-06-05 06:59:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:59:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:55,209 INFO L225 Difference]: With dead ends: 18811 [2021-06-05 06:59:55,209 INFO L226 Difference]: Without dead ends: 18811 [2021-06-05 06:59:55,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:59:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18811 states. [2021-06-05 06:59:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18811 to 10613. [2021-06-05 06:59:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 3.80352431209951) internal successors, (40363), 10612 states have internal predecessors, (40363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 40363 transitions. [2021-06-05 06:59:55,480 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 40363 transitions. Word has length 28 [2021-06-05 06:59:55,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:55,480 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 40363 transitions. [2021-06-05 06:59:55,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:55,480 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 40363 transitions. [2021-06-05 06:59:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:55,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:55,496 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:55,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3558 [2021-06-05 06:59:55,696 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:55,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:55,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1430395937, now seen corresponding path program 103 times [2021-06-05 06:59:55,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:55,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85524088] [2021-06-05 06:59:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:55,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85524088] [2021-06-05 06:59:55,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85524088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005663861] [2021-06-05 06:59:55,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:55,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:55,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005663861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:55,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:55,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:55,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832689561] [2021-06-05 06:59:55,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:55,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:55,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:55,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:55,862 INFO L87 Difference]: Start difference. First operand 10613 states and 40363 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:57,012 INFO L93 Difference]: Finished difference Result 19418 states and 69911 transitions. [2021-06-05 06:59:57,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 06:59:57,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:57,050 INFO L225 Difference]: With dead ends: 19418 [2021-06-05 06:59:57,050 INFO L226 Difference]: Without dead ends: 19418 [2021-06-05 06:59:57,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 719.4ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:59:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19418 states. [2021-06-05 06:59:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19418 to 10725. [2021-06-05 06:59:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10725 states, 10724 states have (on average 3.7958784035807533) internal successors, (40707), 10724 states have internal predecessors, (40707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10725 states to 10725 states and 40707 transitions. [2021-06-05 06:59:57,327 INFO L78 Accepts]: Start accepts. Automaton has 10725 states and 40707 transitions. Word has length 28 [2021-06-05 06:59:57,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:57,327 INFO L482 AbstractCegarLoop]: Abstraction has 10725 states and 40707 transitions. [2021-06-05 06:59:57,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:57,327 INFO L276 IsEmpty]: Start isEmpty. Operand 10725 states and 40707 transitions. [2021-06-05 06:59:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:57,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:57,342 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:57,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3559 [2021-06-05 06:59:57,543 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash 375018543, now seen corresponding path program 104 times [2021-06-05 06:59:57,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:57,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030028947] [2021-06-05 06:59:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:57,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:57,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030028947] [2021-06-05 06:59:57,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030028947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:57,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757888469] [2021-06-05 06:59:57,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:57,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:57,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:57,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:57,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:57,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757888469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:57,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:57,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:57,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278439672] [2021-06-05 06:59:57,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:57,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:57,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:57,785 INFO L87 Difference]: Start difference. First operand 10725 states and 40707 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:58,799 INFO L93 Difference]: Finished difference Result 18990 states and 68747 transitions. [2021-06-05 06:59:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:59:58,799 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:58,841 INFO L225 Difference]: With dead ends: 18990 [2021-06-05 06:59:58,841 INFO L226 Difference]: Without dead ends: 18986 [2021-06-05 06:59:58,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 603.6ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:59:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18986 states. [2021-06-05 06:59:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18986 to 10651. [2021-06-05 06:59:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10651 states, 10650 states have (on average 3.7998122065727697) internal successors, (40468), 10650 states have internal predecessors, (40468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10651 states to 10651 states and 40468 transitions. [2021-06-05 06:59:59,111 INFO L78 Accepts]: Start accepts. Automaton has 10651 states and 40468 transitions. Word has length 28 [2021-06-05 06:59:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:59,111 INFO L482 AbstractCegarLoop]: Abstraction has 10651 states and 40468 transitions. [2021-06-05 06:59:59,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 10651 states and 40468 transitions. [2021-06-05 06:59:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:59,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:59,126 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:59,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-05 06:59:59,327 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:59,327 INFO L82 PathProgramCache]: Analyzing trace with hash -156751667, now seen corresponding path program 105 times [2021-06-05 06:59:59,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:59,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185632884] [2021-06-05 06:59:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:59,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:59,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185632884] [2021-06-05 06:59:59,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185632884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:59,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667916185] [2021-06-05 06:59:59,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:59,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:59,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:59,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:59,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:59,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667916185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:59,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:59,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:59:59,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50269803] [2021-06-05 06:59:59,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:59,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:59,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:59,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:59,494 INFO L87 Difference]: Start difference. First operand 10651 states and 40468 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:00,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:00,608 INFO L93 Difference]: Finished difference Result 18417 states and 66232 transitions. [2021-06-05 07:00:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:00:00,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:00,643 INFO L225 Difference]: With dead ends: 18417 [2021-06-05 07:00:00,643 INFO L226 Difference]: Without dead ends: 18417 [2021-06-05 07:00:00,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 693.5ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 07:00:00,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18417 states. [2021-06-05 07:00:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18417 to 10878. [2021-06-05 07:00:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10878 states, 10877 states have (on average 3.803070699641445) internal successors, (41366), 10877 states have internal predecessors, (41366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10878 states to 10878 states and 41366 transitions. [2021-06-05 07:00:00,978 INFO L78 Accepts]: Start accepts. Automaton has 10878 states and 41366 transitions. Word has length 28 [2021-06-05 07:00:00,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:00,978 INFO L482 AbstractCegarLoop]: Abstraction has 10878 states and 41366 transitions. [2021-06-05 07:00:00,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:00,978 INFO L276 IsEmpty]: Start isEmpty. Operand 10878 states and 41366 transitions. [2021-06-05 07:00:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:00,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:00,995 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:01,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3561 [2021-06-05 07:00:01,196 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash -534318835, now seen corresponding path program 106 times [2021-06-05 07:00:01,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:01,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758516375] [2021-06-05 07:00:01,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:01,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:01,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758516375] [2021-06-05 07:00:01,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758516375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:01,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476901186] [2021-06-05 07:00:01,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:01,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:01,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:01,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:01,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476901186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:01,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:01,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:00:01,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210611933] [2021-06-05 07:00:01,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:00:01,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:01,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:00:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:00:01,366 INFO L87 Difference]: Start difference. First operand 10878 states and 41366 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:02,386 INFO L93 Difference]: Finished difference Result 18127 states and 65426 transitions. [2021-06-05 07:00:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:00:02,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:02,423 INFO L225 Difference]: With dead ends: 18127 [2021-06-05 07:00:02,423 INFO L226 Difference]: Without dead ends: 18115 [2021-06-05 07:00:02,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 596.8ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:00:02,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18115 states. [2021-06-05 07:00:02,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18115 to 10980. [2021-06-05 07:00:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 3.79715821113034) internal successors, (41689), 10979 states have internal predecessors, (41689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 41689 transitions. [2021-06-05 07:00:02,693 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 41689 transitions. Word has length 28 [2021-06-05 07:00:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:02,693 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 41689 transitions. [2021-06-05 07:00:02,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 41689 transitions. [2021-06-05 07:00:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:02,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:02,710 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:02,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3562 [2021-06-05 07:00:02,911 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:02,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:02,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1732149001, now seen corresponding path program 73 times [2021-06-05 07:00:02,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:02,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597580921] [2021-06-05 07:00:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:02,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:02,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597580921] [2021-06-05 07:00:02,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597580921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:02,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360215400] [2021-06-05 07:00:02,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:03,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360215400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:03,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:03,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:00:03,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282393329] [2021-06-05 07:00:03,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:03,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:03,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:03,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:03,046 INFO L87 Difference]: Start difference. First operand 10980 states and 41689 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:03,545 INFO L93 Difference]: Finished difference Result 15635 states and 57800 transitions. [2021-06-05 07:00:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:00:03,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:03,585 INFO L225 Difference]: With dead ends: 15635 [2021-06-05 07:00:03,585 INFO L226 Difference]: Without dead ends: 15635 [2021-06-05 07:00:03,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:00:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15635 states. [2021-06-05 07:00:03,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15635 to 11052. [2021-06-05 07:00:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 11051 states have (on average 3.7925074653877475) internal successors, (41911), 11051 states have internal predecessors, (41911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 41911 transitions. [2021-06-05 07:00:03,947 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 41911 transitions. Word has length 28 [2021-06-05 07:00:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:03,947 INFO L482 AbstractCegarLoop]: Abstraction has 11052 states and 41911 transitions. [2021-06-05 07:00:03,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 41911 transitions. [2021-06-05 07:00:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:03,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:03,966 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:04,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:04,166 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:04,167 INFO L82 PathProgramCache]: Analyzing trace with hash -38357591, now seen corresponding path program 74 times [2021-06-05 07:00:04,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:04,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250120967] [2021-06-05 07:00:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:04,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:04,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250120967] [2021-06-05 07:00:04,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250120967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:04,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246017358] [2021-06-05 07:00:04,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:04,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:04,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:04,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:04,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:04,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246017358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:04,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:04,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:00:04,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42453520] [2021-06-05 07:00:04,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:04,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:04,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:04,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:04,312 INFO L87 Difference]: Start difference. First operand 11052 states and 41911 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:04,909 INFO L93 Difference]: Finished difference Result 16589 states and 60571 transitions. [2021-06-05 07:00:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:00:04,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:04,944 INFO L225 Difference]: With dead ends: 16589 [2021-06-05 07:00:04,944 INFO L226 Difference]: Without dead ends: 16589 [2021-06-05 07:00:04,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:00:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16589 states. [2021-06-05 07:00:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16589 to 11366. [2021-06-05 07:00:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 3.7756269247690275) internal successors, (42910), 11365 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 42910 transitions. [2021-06-05 07:00:05,225 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 42910 transitions. Word has length 28 [2021-06-05 07:00:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:05,225 INFO L482 AbstractCegarLoop]: Abstraction has 11366 states and 42910 transitions. [2021-06-05 07:00:05,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 42910 transitions. [2021-06-05 07:00:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:05,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:05,245 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:05,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:05,446 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:05,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:05,446 INFO L82 PathProgramCache]: Analyzing trace with hash 907762153, now seen corresponding path program 75 times [2021-06-05 07:00:05,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:05,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146359770] [2021-06-05 07:00:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:05,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:05,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146359770] [2021-06-05 07:00:05,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146359770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:05,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066231703] [2021-06-05 07:00:05,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:05,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:00:05,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:05,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:05,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:05,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066231703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:05,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:05,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:00:05,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380372659] [2021-06-05 07:00:05,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:05,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:05,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:05,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:05,570 INFO L87 Difference]: Start difference. First operand 11366 states and 42910 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:06,021 INFO L93 Difference]: Finished difference Result 16097 states and 59284 transitions. [2021-06-05 07:00:06,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:00:06,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:06,055 INFO L225 Difference]: With dead ends: 16097 [2021-06-05 07:00:06,056 INFO L226 Difference]: Without dead ends: 16089 [2021-06-05 07:00:06,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:00:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-06-05 07:00:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 11306. [2021-06-05 07:00:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11306 states, 11305 states have (on average 3.77797434763379) internal successors, (42710), 11305 states have internal predecessors, (42710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11306 states to 11306 states and 42710 transitions. [2021-06-05 07:00:06,329 INFO L78 Accepts]: Start accepts. Automaton has 11306 states and 42710 transitions. Word has length 28 [2021-06-05 07:00:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:06,329 INFO L482 AbstractCegarLoop]: Abstraction has 11306 states and 42710 transitions. [2021-06-05 07:00:06,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 11306 states and 42710 transitions. [2021-06-05 07:00:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:06,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:06,347 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:06,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3565,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:06,547 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash -13939987, now seen corresponding path program 76 times [2021-06-05 07:00:06,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:06,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116088049] [2021-06-05 07:00:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:06,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:06,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116088049] [2021-06-05 07:00:06,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116088049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:06,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818761993] [2021-06-05 07:00:06,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:06,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:06,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:06,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:06,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818761993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:06,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:06,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:00:06,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019163954] [2021-06-05 07:00:06,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:06,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:06,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:06,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:06,677 INFO L87 Difference]: Start difference. First operand 11306 states and 42710 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:07,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:07,234 INFO L93 Difference]: Finished difference Result 15997 states and 59000 transitions. [2021-06-05 07:00:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:00:07,234 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:07,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:07,266 INFO L225 Difference]: With dead ends: 15997 [2021-06-05 07:00:07,266 INFO L226 Difference]: Without dead ends: 15985 [2021-06-05 07:00:07,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:00:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15985 states. [2021-06-05 07:00:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15985 to 11272. [2021-06-05 07:00:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.780055008428711) internal successors, (42605), 11271 states have internal predecessors, (42605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 42605 transitions. [2021-06-05 07:00:07,508 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 42605 transitions. Word has length 28 [2021-06-05 07:00:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:07,508 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 42605 transitions. [2021-06-05 07:00:07,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 42605 transitions. [2021-06-05 07:00:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:07,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:07,525 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:07,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3566 [2021-06-05 07:00:07,726 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:07,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:07,726 INFO L82 PathProgramCache]: Analyzing trace with hash -141251547, now seen corresponding path program 77 times [2021-06-05 07:00:07,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:07,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005485109] [2021-06-05 07:00:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:07,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:07,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005485109] [2021-06-05 07:00:07,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005485109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:07,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504900992] [2021-06-05 07:00:07,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:07,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:00:07,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:07,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504900992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:07,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:07,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:00:07,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774470680] [2021-06-05 07:00:07,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:00:07,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:07,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:00:07,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:00:07,924 INFO L87 Difference]: Start difference. First operand 11272 states and 42605 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:08,928 INFO L93 Difference]: Finished difference Result 21775 states and 77547 transitions. [2021-06-05 07:00:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:00:08,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:08,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:08,970 INFO L225 Difference]: With dead ends: 21775 [2021-06-05 07:00:08,970 INFO L226 Difference]: Without dead ends: 21775 [2021-06-05 07:00:08,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:00:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-06-05 07:00:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 11246. [2021-06-05 07:00:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11246 states, 11245 states have (on average 3.779101823032459) internal successors, (42496), 11245 states have internal predecessors, (42496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 42496 transitions. [2021-06-05 07:00:09,255 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 42496 transitions. Word has length 28 [2021-06-05 07:00:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:09,255 INFO L482 AbstractCegarLoop]: Abstraction has 11246 states and 42496 transitions. [2021-06-05 07:00:09,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 42496 transitions. [2021-06-05 07:00:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:09,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:09,274 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:09,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3567,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:09,475 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:09,475 INFO L82 PathProgramCache]: Analyzing trace with hash 385520361, now seen corresponding path program 107 times [2021-06-05 07:00:09,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:09,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182190273] [2021-06-05 07:00:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:09,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:09,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182190273] [2021-06-05 07:00:09,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182190273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:09,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025586367] [2021-06-05 07:00:09,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:09,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:00:09,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:09,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:09,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:09,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025586367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:09,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:09,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:00:09,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093007409] [2021-06-05 07:00:09,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:09,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:09,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:09,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:09,624 INFO L87 Difference]: Start difference. First operand 11246 states and 42496 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:10,366 INFO L93 Difference]: Finished difference Result 17570 states and 63375 transitions. [2021-06-05 07:00:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:00:10,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:10,404 INFO L225 Difference]: With dead ends: 17570 [2021-06-05 07:00:10,404 INFO L226 Difference]: Without dead ends: 17557 [2021-06-05 07:00:10,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:00:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17557 states. [2021-06-05 07:00:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17557 to 12557. [2021-06-05 07:00:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12557 states, 12556 states have (on average 3.8467664861420836) internal successors, (48300), 12556 states have internal predecessors, (48300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12557 states to 12557 states and 48300 transitions. [2021-06-05 07:00:10,752 INFO L78 Accepts]: Start accepts. Automaton has 12557 states and 48300 transitions. Word has length 28 [2021-06-05 07:00:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:10,752 INFO L482 AbstractCegarLoop]: Abstraction has 12557 states and 48300 transitions. [2021-06-05 07:00:10,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 12557 states and 48300 transitions. [2021-06-05 07:00:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:10,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:10,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:10,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3568 [2021-06-05 07:00:10,973 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1057933143, now seen corresponding path program 108 times [2021-06-05 07:00:10,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:10,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767575766] [2021-06-05 07:00:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:11,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:11,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767575766] [2021-06-05 07:00:11,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767575766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:11,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000086359] [2021-06-05 07:00:11,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:11,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:11,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:11,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:11,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:11,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000086359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:11,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:11,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:00:11,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924328127] [2021-06-05 07:00:11,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:11,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:11,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:11,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:11,122 INFO L87 Difference]: Start difference. First operand 12557 states and 48300 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:11,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:11,938 INFO L93 Difference]: Finished difference Result 17668 states and 63624 transitions. [2021-06-05 07:00:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:00:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:11,975 INFO L225 Difference]: With dead ends: 17668 [2021-06-05 07:00:11,975 INFO L226 Difference]: Without dead ends: 17662 [2021-06-05 07:00:11,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 436.9ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:00:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17662 states. [2021-06-05 07:00:12,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17662 to 12530. [2021-06-05 07:00:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12529 states have (on average 3.845957378880996) internal successors, (48186), 12529 states have internal predecessors, (48186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 48186 transitions. [2021-06-05 07:00:12,315 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 48186 transitions. Word has length 28 [2021-06-05 07:00:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:12,316 INFO L482 AbstractCegarLoop]: Abstraction has 12530 states and 48186 transitions. [2021-06-05 07:00:12,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 48186 transitions. [2021-06-05 07:00:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:12,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:12,333 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:12,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:12,534 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:12,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:12,534 INFO L82 PathProgramCache]: Analyzing trace with hash -757405679, now seen corresponding path program 109 times [2021-06-05 07:00:12,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:12,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681859076] [2021-06-05 07:00:12,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:12,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:12,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681859076] [2021-06-05 07:00:12,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681859076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:12,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116168233] [2021-06-05 07:00:12,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:12,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:12,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:12,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116168233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:12,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:12,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:00:12,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539677170] [2021-06-05 07:00:12,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:12,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:12,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:12,671 INFO L87 Difference]: Start difference. First operand 12530 states and 48186 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:13,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:13,351 INFO L93 Difference]: Finished difference Result 19731 states and 71148 transitions. [2021-06-05 07:00:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:00:13,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:13,395 INFO L225 Difference]: With dead ends: 19731 [2021-06-05 07:00:13,395 INFO L226 Difference]: Without dead ends: 19718 [2021-06-05 07:00:13,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:00:13,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19718 states. [2021-06-05 07:00:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19718 to 12590. [2021-06-05 07:00:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12590 states, 12589 states have (on average 3.850663277464453) internal successors, (48476), 12589 states have internal predecessors, (48476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12590 states to 12590 states and 48476 transitions. [2021-06-05 07:00:13,736 INFO L78 Accepts]: Start accepts. Automaton has 12590 states and 48476 transitions. Word has length 28 [2021-06-05 07:00:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:13,736 INFO L482 AbstractCegarLoop]: Abstraction has 12590 states and 48476 transitions. [2021-06-05 07:00:13,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 12590 states and 48476 transitions. [2021-06-05 07:00:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:13,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:13,757 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:13,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3570,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:13,958 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:13,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1440150009, now seen corresponding path program 110 times [2021-06-05 07:00:13,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:13,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030747688] [2021-06-05 07:00:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:13,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:13,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030747688] [2021-06-05 07:00:13,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030747688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:13,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833734261] [2021-06-05 07:00:13,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:14,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:14,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:14,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:14,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833734261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:14,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:14,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:00:14,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592030819] [2021-06-05 07:00:14,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:14,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:14,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:14,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:14,203 INFO L87 Difference]: Start difference. First operand 12590 states and 48476 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:14,924 INFO L93 Difference]: Finished difference Result 20868 states and 74696 transitions. [2021-06-05 07:00:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:00:14,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:14,965 INFO L225 Difference]: With dead ends: 20868 [2021-06-05 07:00:14,965 INFO L226 Difference]: Without dead ends: 20868 [2021-06-05 07:00:14,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 417.6ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:00:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20868 states. [2021-06-05 07:00:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20868 to 12606. [2021-06-05 07:00:15,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12606 states, 12605 states have (on average 3.8476001586671957) internal successors, (48499), 12605 states have internal predecessors, (48499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12606 states to 12606 states and 48499 transitions. [2021-06-05 07:00:15,295 INFO L78 Accepts]: Start accepts. Automaton has 12606 states and 48499 transitions. Word has length 28 [2021-06-05 07:00:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:15,296 INFO L482 AbstractCegarLoop]: Abstraction has 12606 states and 48499 transitions. [2021-06-05 07:00:15,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 12606 states and 48499 transitions. [2021-06-05 07:00:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:15,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:15,316 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:15,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3571 [2021-06-05 07:00:15,517 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash -373053407, now seen corresponding path program 78 times [2021-06-05 07:00:15,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:15,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622468185] [2021-06-05 07:00:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:15,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:15,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622468185] [2021-06-05 07:00:15,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622468185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:15,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498044762] [2021-06-05 07:00:15,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:15,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:00:15,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:15,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:15,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:15,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498044762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:15,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:15,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:00:15,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376889569] [2021-06-05 07:00:15,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:15,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:15,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:15,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:15,690 INFO L87 Difference]: Start difference. First operand 12606 states and 48499 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:16,723 INFO L93 Difference]: Finished difference Result 21980 states and 80698 transitions. [2021-06-05 07:00:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:00:16,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:16,780 INFO L225 Difference]: With dead ends: 21980 [2021-06-05 07:00:16,780 INFO L226 Difference]: Without dead ends: 21976 [2021-06-05 07:00:16,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 580.0ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:00:16,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-06-05 07:00:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 12860. [2021-06-05 07:00:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12860 states, 12859 states have (on average 3.837001322031262) internal successors, (49340), 12859 states have internal predecessors, (49340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12860 states to 12860 states and 49340 transitions. [2021-06-05 07:00:17,191 INFO L78 Accepts]: Start accepts. Automaton has 12860 states and 49340 transitions. Word has length 28 [2021-06-05 07:00:17,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:17,191 INFO L482 AbstractCegarLoop]: Abstraction has 12860 states and 49340 transitions. [2021-06-05 07:00:17,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 12860 states and 49340 transitions. [2021-06-05 07:00:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:17,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:17,214 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:17,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3572,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:17,414 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:17,415 INFO L82 PathProgramCache]: Analyzing trace with hash -498610355, now seen corresponding path program 111 times [2021-06-05 07:00:17,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:17,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020994832] [2021-06-05 07:00:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:17,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:17,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020994832] [2021-06-05 07:00:17,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020994832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:17,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649016249] [2021-06-05 07:00:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:17,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:00:17,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:17,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:17,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:17,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649016249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:17,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:17,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:00:17,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145952826] [2021-06-05 07:00:17,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:17,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:17,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:17,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:17,648 INFO L87 Difference]: Start difference. First operand 12860 states and 49340 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:18,390 INFO L93 Difference]: Finished difference Result 18670 states and 68341 transitions. [2021-06-05 07:00:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:00:18,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:18,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:18,433 INFO L225 Difference]: With dead ends: 18670 [2021-06-05 07:00:18,434 INFO L226 Difference]: Without dead ends: 18647 [2021-06-05 07:00:18,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 382.8ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:00:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18647 states. [2021-06-05 07:00:18,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18647 to 13152. [2021-06-05 07:00:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13152 states, 13151 states have (on average 3.854307657212379) internal successors, (50688), 13151 states have internal predecessors, (50688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13152 states to 13152 states and 50688 transitions. [2021-06-05 07:00:18,790 INFO L78 Accepts]: Start accepts. Automaton has 13152 states and 50688 transitions. Word has length 28 [2021-06-05 07:00:18,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:18,790 INFO L482 AbstractCegarLoop]: Abstraction has 13152 states and 50688 transitions. [2021-06-05 07:00:18,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 13152 states and 50688 transitions. [2021-06-05 07:00:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:18,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:18,812 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:19,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3573 [2021-06-05 07:00:19,013 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:19,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1181354685, now seen corresponding path program 112 times [2021-06-05 07:00:19,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:19,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448829379] [2021-06-05 07:00:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:19,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:19,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448829379] [2021-06-05 07:00:19,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448829379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:19,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762830471] [2021-06-05 07:00:19,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:19,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:19,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:19,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:19,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:19,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762830471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:19,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:19,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:00:19,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342248457] [2021-06-05 07:00:19,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:19,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:19,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:19,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:19,151 INFO L87 Difference]: Start difference. First operand 13152 states and 50688 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:19,937 INFO L93 Difference]: Finished difference Result 18648 states and 67382 transitions. [2021-06-05 07:00:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:00:19,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:19,980 INFO L225 Difference]: With dead ends: 18648 [2021-06-05 07:00:19,980 INFO L226 Difference]: Without dead ends: 18648 [2021-06-05 07:00:19,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:00:20,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-06-05 07:00:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 13107. [2021-06-05 07:00:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13107 states, 13106 states have (on average 3.8461010224324736) internal successors, (50407), 13106 states have internal predecessors, (50407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13107 states to 13107 states and 50407 transitions. [2021-06-05 07:00:20,302 INFO L78 Accepts]: Start accepts. Automaton has 13107 states and 50407 transitions. Word has length 28 [2021-06-05 07:00:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:20,302 INFO L482 AbstractCegarLoop]: Abstraction has 13107 states and 50407 transitions. [2021-06-05 07:00:20,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 13107 states and 50407 transitions. [2021-06-05 07:00:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:20,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:20,324 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:20,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3574,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:20,525 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:20,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1501473149, now seen corresponding path program 113 times [2021-06-05 07:00:20,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:20,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673792817] [2021-06-05 07:00:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:20,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:20,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673792817] [2021-06-05 07:00:20,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673792817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:20,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104877863] [2021-06-05 07:00:20,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:20,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:00:20,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:20,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:20,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:20,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104877863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:20,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:20,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:00:20,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346773424] [2021-06-05 07:00:20,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:20,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:20,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:20,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:20,687 INFO L87 Difference]: Start difference. First operand 13107 states and 50407 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:21,378 INFO L93 Difference]: Finished difference Result 19972 states and 72578 transitions. [2021-06-05 07:00:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:00:21,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:21,420 INFO L225 Difference]: With dead ends: 19972 [2021-06-05 07:00:21,420 INFO L226 Difference]: Without dead ends: 19972 [2021-06-05 07:00:21,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:00:21,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19972 states. [2021-06-05 07:00:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19972 to 13820. [2021-06-05 07:00:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13820 states, 13819 states have (on average 3.832259931977712) internal successors, (52958), 13819 states have internal predecessors, (52958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13820 states to 13820 states and 52958 transitions. [2021-06-05 07:00:21,813 INFO L78 Accepts]: Start accepts. Automaton has 13820 states and 52958 transitions. Word has length 28 [2021-06-05 07:00:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:21,813 INFO L482 AbstractCegarLoop]: Abstraction has 13820 states and 52958 transitions. [2021-06-05 07:00:21,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 13820 states and 52958 transitions. [2021-06-05 07:00:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:21,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:21,838 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:22,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3575,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:22,038 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:22,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:22,039 INFO L82 PathProgramCache]: Analyzing trace with hash -612070185, now seen corresponding path program 114 times [2021-06-05 07:00:22,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:22,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131458516] [2021-06-05 07:00:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:22,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:22,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131458516] [2021-06-05 07:00:22,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131458516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:22,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546422415] [2021-06-05 07:00:22,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:22,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:00:22,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:22,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:22,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:22,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546422415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:22,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:22,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:00:22,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880016139] [2021-06-05 07:00:22,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:22,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:22,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:22,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:22,191 INFO L87 Difference]: Start difference. First operand 13820 states and 52958 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:23,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:23,062 INFO L93 Difference]: Finished difference Result 22381 states and 80178 transitions. [2021-06-05 07:00:23,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:00:23,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:23,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:23,106 INFO L225 Difference]: With dead ends: 22381 [2021-06-05 07:00:23,106 INFO L226 Difference]: Without dead ends: 22381 [2021-06-05 07:00:23,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:00:23,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22381 states. [2021-06-05 07:00:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22381 to 14048. [2021-06-05 07:00:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14048 states, 14047 states have (on average 3.843881255784153) internal successors, (53995), 14047 states have internal predecessors, (53995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 53995 transitions. [2021-06-05 07:00:23,450 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 53995 transitions. Word has length 28 [2021-06-05 07:00:23,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:23,450 INFO L482 AbstractCegarLoop]: Abstraction has 14048 states and 53995 transitions. [2021-06-05 07:00:23,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 53995 transitions. [2021-06-05 07:00:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:23,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:23,476 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:23,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3576,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:23,676 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:23,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1934603223, now seen corresponding path program 79 times [2021-06-05 07:00:23,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:23,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862648849] [2021-06-05 07:00:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:23,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:23,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862648849] [2021-06-05 07:00:23,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862648849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:23,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430102424] [2021-06-05 07:00:23,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:23,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430102424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:23,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:23,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:00:23,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858916055] [2021-06-05 07:00:23,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:00:23,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:23,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:00:23,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:00:23,844 INFO L87 Difference]: Start difference. First operand 14048 states and 53995 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:25,434 INFO L93 Difference]: Finished difference Result 39001 states and 140171 transitions. [2021-06-05 07:00:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:00:25,434 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:25,531 INFO L225 Difference]: With dead ends: 39001 [2021-06-05 07:00:25,532 INFO L226 Difference]: Without dead ends: 39001 [2021-06-05 07:00:25,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 938.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:00:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39001 states. [2021-06-05 07:00:26,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39001 to 15286. [2021-06-05 07:00:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15286 states, 15285 states have (on average 3.890677134445535) internal successors, (59469), 15285 states have internal predecessors, (59469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15286 states to 15286 states and 59469 transitions. [2021-06-05 07:00:26,156 INFO L78 Accepts]: Start accepts. Automaton has 15286 states and 59469 transitions. Word has length 28 [2021-06-05 07:00:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:26,156 INFO L482 AbstractCegarLoop]: Abstraction has 15286 states and 59469 transitions. [2021-06-05 07:00:26,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 15286 states and 59469 transitions. [2021-06-05 07:00:26,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:26,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:26,182 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:26,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:26,382 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:26,383 INFO L82 PathProgramCache]: Analyzing trace with hash -405698579, now seen corresponding path program 80 times [2021-06-05 07:00:26,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:26,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035911782] [2021-06-05 07:00:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:26,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:26,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035911782] [2021-06-05 07:00:26,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035911782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:26,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560288061] [2021-06-05 07:00:26,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:26,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:26,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:26,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:26,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:26,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560288061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:26,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:26,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:00:26,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312155490] [2021-06-05 07:00:26,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:00:26,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:00:26,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:00:26,556 INFO L87 Difference]: Start difference. First operand 15286 states and 59469 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:28,081 INFO L93 Difference]: Finished difference Result 38023 states and 137597 transitions. [2021-06-05 07:00:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:00:28,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:28,171 INFO L225 Difference]: With dead ends: 38023 [2021-06-05 07:00:28,172 INFO L226 Difference]: Without dead ends: 38023 [2021-06-05 07:00:28,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 935.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:00:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38023 states. [2021-06-05 07:00:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38023 to 15260. [2021-06-05 07:00:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15260 states, 15259 states have (on average 3.8870830329641524) internal successors, (59313), 15259 states have internal predecessors, (59313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15260 states to 15260 states and 59313 transitions. [2021-06-05 07:00:28,739 INFO L78 Accepts]: Start accepts. Automaton has 15260 states and 59313 transitions. Word has length 28 [2021-06-05 07:00:28,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:28,739 INFO L482 AbstractCegarLoop]: Abstraction has 15260 states and 59313 transitions. [2021-06-05 07:00:28,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand 15260 states and 59313 transitions. [2021-06-05 07:00:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:28,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:28,765 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:28,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3578 [2021-06-05 07:00:28,966 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:28,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:28,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1649877491, now seen corresponding path program 115 times [2021-06-05 07:00:28,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:28,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167874211] [2021-06-05 07:00:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:29,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:29,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167874211] [2021-06-05 07:00:29,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167874211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:29,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543043673] [2021-06-05 07:00:29,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:29,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:29,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:29,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543043673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:29,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:29,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:00:29,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841697233] [2021-06-05 07:00:29,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:29,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:29,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:29,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:29,085 INFO L87 Difference]: Start difference. First operand 15260 states and 59313 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:29,392 INFO L93 Difference]: Finished difference Result 23613 states and 90414 transitions. [2021-06-05 07:00:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:00:29,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:29,445 INFO L225 Difference]: With dead ends: 23613 [2021-06-05 07:00:29,445 INFO L226 Difference]: Without dead ends: 23563 [2021-06-05 07:00:29,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:00:29,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23563 states. [2021-06-05 07:00:29,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23563 to 20372. [2021-06-05 07:00:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20372 states, 20371 states have (on average 3.902803004270777) internal successors, (79504), 20371 states have internal predecessors, (79504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20372 states to 20372 states and 79504 transitions. [2021-06-05 07:00:29,911 INFO L78 Accepts]: Start accepts. Automaton has 20372 states and 79504 transitions. Word has length 28 [2021-06-05 07:00:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:29,911 INFO L482 AbstractCegarLoop]: Abstraction has 20372 states and 79504 transitions. [2021-06-05 07:00:29,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:29,912 INFO L276 IsEmpty]: Start isEmpty. Operand 20372 states and 79504 transitions. [2021-06-05 07:00:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:29,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:29,941 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:30,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3579,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:30,142 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:30,142 INFO L82 PathProgramCache]: Analyzing trace with hash 260189251, now seen corresponding path program 116 times [2021-06-05 07:00:30,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:30,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633863396] [2021-06-05 07:00:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:30,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:30,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633863396] [2021-06-05 07:00:30,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633863396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:30,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341671118] [2021-06-05 07:00:30,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:30,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:30,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:30,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:30,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341671118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:30,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:30,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:00:30,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364764197] [2021-06-05 07:00:30,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:00:30,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:30,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:00:30,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:00:30,259 INFO L87 Difference]: Start difference. First operand 20372 states and 79504 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:30,504 INFO L93 Difference]: Finished difference Result 23123 states and 87862 transitions. [2021-06-05 07:00:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:00:30,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:30,555 INFO L225 Difference]: With dead ends: 23123 [2021-06-05 07:00:30,556 INFO L226 Difference]: Without dead ends: 23123 [2021-06-05 07:00:30,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:00:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23123 states. [2021-06-05 07:00:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23123 to 19875. [2021-06-05 07:00:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19875 states, 19874 states have (on average 3.891114018315387) internal successors, (77332), 19874 states have internal predecessors, (77332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19875 states to 19875 states and 77332 transitions. [2021-06-05 07:00:30,958 INFO L78 Accepts]: Start accepts. Automaton has 19875 states and 77332 transitions. Word has length 28 [2021-06-05 07:00:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:30,958 INFO L482 AbstractCegarLoop]: Abstraction has 19875 states and 77332 transitions. [2021-06-05 07:00:30,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 19875 states and 77332 transitions. [2021-06-05 07:00:30,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:30,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:30,988 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:31,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3580 [2021-06-05 07:00:31,189 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:31,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:31,189 INFO L82 PathProgramCache]: Analyzing trace with hash -691492187, now seen corresponding path program 117 times [2021-06-05 07:00:31,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:31,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539660227] [2021-06-05 07:00:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:31,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:31,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539660227] [2021-06-05 07:00:31,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539660227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:31,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844802588] [2021-06-05 07:00:31,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:31,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:00:31,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:31,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:31,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:31,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844802588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:31,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:31,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 07:00:31,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345724627] [2021-06-05 07:00:31,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:00:31,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:31,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:00:31,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:00:31,378 INFO L87 Difference]: Start difference. First operand 19875 states and 77332 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:32,346 INFO L93 Difference]: Finished difference Result 31643 states and 117215 transitions. [2021-06-05 07:00:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:00:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:32,423 INFO L225 Difference]: With dead ends: 31643 [2021-06-05 07:00:32,424 INFO L226 Difference]: Without dead ends: 31643 [2021-06-05 07:00:32,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:00:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31643 states. [2021-06-05 07:00:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31643 to 19937. [2021-06-05 07:00:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19937 states, 19936 states have (on average 3.889446227929374) internal successors, (77540), 19936 states have internal predecessors, (77540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19937 states to 19937 states and 77540 transitions. [2021-06-05 07:00:33,079 INFO L78 Accepts]: Start accepts. Automaton has 19937 states and 77540 transitions. Word has length 28 [2021-06-05 07:00:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:33,079 INFO L482 AbstractCegarLoop]: Abstraction has 19937 states and 77540 transitions. [2021-06-05 07:00:33,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 19937 states and 77540 transitions. [2021-06-05 07:00:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:33,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:33,117 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:33,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-06-05 07:00:33,318 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1667811031, now seen corresponding path program 118 times [2021-06-05 07:00:33,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:33,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340497687] [2021-06-05 07:00:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:33,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:33,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340497687] [2021-06-05 07:00:33,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340497687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:33,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998337600] [2021-06-05 07:00:33,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:33,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:33,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:33,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:33,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:33,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998337600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:33,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:33,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:00:33,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985613769] [2021-06-05 07:00:33,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:00:33,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:33,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:00:33,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:00:33,499 INFO L87 Difference]: Start difference. First operand 19937 states and 77540 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:35,136 INFO L93 Difference]: Finished difference Result 40452 states and 148213 transitions. [2021-06-05 07:00:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:00:35,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:35,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:35,240 INFO L225 Difference]: With dead ends: 40452 [2021-06-05 07:00:35,240 INFO L226 Difference]: Without dead ends: 40452 [2021-06-05 07:00:35,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 992.2ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 07:00:35,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-06-05 07:00:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 19942. [2021-06-05 07:00:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19942 states, 19941 states have (on average 3.891530013539943) internal successors, (77601), 19941 states have internal predecessors, (77601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19942 states to 19942 states and 77601 transitions. [2021-06-05 07:00:35,907 INFO L78 Accepts]: Start accepts. Automaton has 19942 states and 77601 transitions. Word has length 28 [2021-06-05 07:00:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:35,907 INFO L482 AbstractCegarLoop]: Abstraction has 19942 states and 77601 transitions. [2021-06-05 07:00:35,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 19942 states and 77601 transitions. [2021-06-05 07:00:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:35,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:35,945 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:36,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3582,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:36,149 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash -138906387, now seen corresponding path program 119 times [2021-06-05 07:00:36,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:36,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130609201] [2021-06-05 07:00:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:36,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:36,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130609201] [2021-06-05 07:00:36,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130609201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:36,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742645762] [2021-06-05 07:00:36,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:36,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:00:36,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:36,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:36,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:36,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742645762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:36,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:36,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:00:36,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848449021] [2021-06-05 07:00:36,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:00:36,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:36,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:00:36,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:00:36,317 INFO L87 Difference]: Start difference. First operand 19942 states and 77601 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:37,879 INFO L93 Difference]: Finished difference Result 40013 states and 147353 transitions. [2021-06-05 07:00:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:00:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:37,982 INFO L225 Difference]: With dead ends: 40013 [2021-06-05 07:00:37,982 INFO L226 Difference]: Without dead ends: 40013 [2021-06-05 07:00:37,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 926.3ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 07:00:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40013 states. [2021-06-05 07:00:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40013 to 19730. [2021-06-05 07:00:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19730 states, 19729 states have (on average 3.8836230929089157) internal successors, (76620), 19729 states have internal predecessors, (76620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19730 states to 19730 states and 76620 transitions. [2021-06-05 07:00:38,682 INFO L78 Accepts]: Start accepts. Automaton has 19730 states and 76620 transitions. Word has length 28 [2021-06-05 07:00:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:38,683 INFO L482 AbstractCegarLoop]: Abstraction has 19730 states and 76620 transitions. [2021-06-05 07:00:38,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 19730 states and 76620 transitions. [2021-06-05 07:00:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:38,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:38,714 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:38,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3583 [2021-06-05 07:00:38,914 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:38,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:38,914 INFO L82 PathProgramCache]: Analyzing trace with hash -164720279, now seen corresponding path program 120 times [2021-06-05 07:00:38,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:38,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25074223] [2021-06-05 07:00:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:38,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:38,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25074223] [2021-06-05 07:00:38,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25074223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:38,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404028162] [2021-06-05 07:00:38,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:38,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:38,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:38,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:00:38,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:00:39,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404028162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:39,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:39,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 07:00:39,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154821973] [2021-06-05 07:00:39,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:00:39,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:39,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:00:39,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:00:39,030 INFO L87 Difference]: Start difference. First operand 19730 states and 76620 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:39,342 INFO L93 Difference]: Finished difference Result 29201 states and 109016 transitions. [2021-06-05 07:00:39,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:00:39,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:39,418 INFO L225 Difference]: With dead ends: 29201 [2021-06-05 07:00:39,419 INFO L226 Difference]: Without dead ends: 29184 [2021-06-05 07:00:39,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:00:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29184 states. [2021-06-05 07:00:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29184 to 19998. [2021-06-05 07:00:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19998 states, 19997 states have (on average 3.889183377506626) internal successors, (77772), 19997 states have internal predecessors, (77772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19998 states to 19998 states and 77772 transitions. [2021-06-05 07:00:39,965 INFO L78 Accepts]: Start accepts. Automaton has 19998 states and 77772 transitions. Word has length 28 [2021-06-05 07:00:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:39,965 INFO L482 AbstractCegarLoop]: Abstraction has 19998 states and 77772 transitions. [2021-06-05 07:00:39,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 19998 states and 77772 transitions. [2021-06-05 07:00:39,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:39,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:39,998 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:40,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3584 [2021-06-05 07:00:40,199 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1307646319, now seen corresponding path program 121 times [2021-06-05 07:00:40,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:40,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399275934] [2021-06-05 07:00:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:40,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:40,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399275934] [2021-06-05 07:00:40,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399275934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:40,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383814155] [2021-06-05 07:00:40,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:40,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:00:40,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:00:40,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383814155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:40,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:40,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 07:00:40,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73077513] [2021-06-05 07:00:40,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:00:40,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:40,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:00:40,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:00:40,317 INFO L87 Difference]: Start difference. First operand 19998 states and 77772 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:40,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:40,610 INFO L93 Difference]: Finished difference Result 30984 states and 114572 transitions. [2021-06-05 07:00:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:00:40,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:40,687 INFO L225 Difference]: With dead ends: 30984 [2021-06-05 07:00:40,687 INFO L226 Difference]: Without dead ends: 30984 [2021-06-05 07:00:40,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:00:40,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30984 states. [2021-06-05 07:00:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30984 to 19667. [2021-06-05 07:00:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19667 states, 19666 states have (on average 3.8739957286687683) internal successors, (76186), 19666 states have internal predecessors, (76186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19667 states to 19667 states and 76186 transitions. [2021-06-05 07:00:41,181 INFO L78 Accepts]: Start accepts. Automaton has 19667 states and 76186 transitions. Word has length 28 [2021-06-05 07:00:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:41,181 INFO L482 AbstractCegarLoop]: Abstraction has 19667 states and 76186 transitions. [2021-06-05 07:00:41,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 19667 states and 76186 transitions. [2021-06-05 07:00:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:41,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:41,213 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:41,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:41,414 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:41,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1640639411, now seen corresponding path program 122 times [2021-06-05 07:00:41,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:41,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512404382] [2021-06-05 07:00:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:41,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:41,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512404382] [2021-06-05 07:00:41,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512404382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:41,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231630706] [2021-06-05 07:00:41,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:41,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:41,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:41,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231630706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:41,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:41,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:00:41,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977468394] [2021-06-05 07:00:41,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:41,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:41,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:41,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:41,566 INFO L87 Difference]: Start difference. First operand 19667 states and 76186 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:42,435 INFO L93 Difference]: Finished difference Result 29160 states and 108410 transitions. [2021-06-05 07:00:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:00:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:42,511 INFO L225 Difference]: With dead ends: 29160 [2021-06-05 07:00:42,511 INFO L226 Difference]: Without dead ends: 29160 [2021-06-05 07:00:42,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 500.1ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:00:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29160 states. [2021-06-05 07:00:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29160 to 19711. [2021-06-05 07:00:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19711 states, 19710 states have (on average 3.8728564180618976) internal successors, (76334), 19710 states have internal predecessors, (76334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19711 states to 19711 states and 76334 transitions. [2021-06-05 07:00:42,987 INFO L78 Accepts]: Start accepts. Automaton has 19711 states and 76334 transitions. Word has length 28 [2021-06-05 07:00:42,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:42,988 INFO L482 AbstractCegarLoop]: Abstraction has 19711 states and 76334 transitions. [2021-06-05 07:00:42,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 19711 states and 76334 transitions. [2021-06-05 07:00:43,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:43,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:43,017 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:43,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:43,220 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:43,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:43,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1869413791, now seen corresponding path program 123 times [2021-06-05 07:00:43,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:43,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107201919] [2021-06-05 07:00:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:43,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:43,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107201919] [2021-06-05 07:00:43,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107201919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:43,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372925296] [2021-06-05 07:00:43,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:43,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:00:43,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:43,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372925296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:43,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:43,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:00:43,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814275612] [2021-06-05 07:00:43,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:43,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:43,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:43,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:43,368 INFO L87 Difference]: Start difference. First operand 19711 states and 76334 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:44,432 INFO L93 Difference]: Finished difference Result 30658 states and 112697 transitions. [2021-06-05 07:00:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 07:00:44,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:44,514 INFO L225 Difference]: With dead ends: 30658 [2021-06-05 07:00:44,514 INFO L226 Difference]: Without dead ends: 30658 [2021-06-05 07:00:44,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 586.7ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:00:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30658 states. [2021-06-05 07:00:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30658 to 20243. [2021-06-05 07:00:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20243 states, 20242 states have (on average 3.8518921055231696) internal successors, (77970), 20242 states have internal predecessors, (77970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20243 states to 20243 states and 77970 transitions. [2021-06-05 07:00:45,064 INFO L78 Accepts]: Start accepts. Automaton has 20243 states and 77970 transitions. Word has length 28 [2021-06-05 07:00:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:45,064 INFO L482 AbstractCegarLoop]: Abstraction has 20243 states and 77970 transitions. [2021-06-05 07:00:45,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20243 states and 77970 transitions. [2021-06-05 07:00:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:45,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:45,095 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:45,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3587,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:45,295 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:45,295 INFO L82 PathProgramCache]: Analyzing trace with hash -923294047, now seen corresponding path program 124 times [2021-06-05 07:00:45,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:45,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236893307] [2021-06-05 07:00:45,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:45,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:45,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236893307] [2021-06-05 07:00:45,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236893307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:45,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836395854] [2021-06-05 07:00:45,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:45,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:45,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:45,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:45,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836395854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:45,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:45,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:00:45,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119229085] [2021-06-05 07:00:45,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:45,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:45,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:45,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:45,456 INFO L87 Difference]: Start difference. First operand 20243 states and 77970 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:46,519 INFO L93 Difference]: Finished difference Result 29767 states and 110352 transitions. [2021-06-05 07:00:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:00:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:46,708 INFO L225 Difference]: With dead ends: 29767 [2021-06-05 07:00:46,708 INFO L226 Difference]: Without dead ends: 29763 [2021-06-05 07:00:46,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 552.7ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:00:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29763 states. [2021-06-05 07:00:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29763 to 20135. [2021-06-05 07:00:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20135 states, 20134 states have (on average 3.854773020760902) internal successors, (77612), 20134 states have internal predecessors, (77612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20135 states to 20135 states and 77612 transitions. [2021-06-05 07:00:47,173 INFO L78 Accepts]: Start accepts. Automaton has 20135 states and 77612 transitions. Word has length 28 [2021-06-05 07:00:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:47,173 INFO L482 AbstractCegarLoop]: Abstraction has 20135 states and 77612 transitions. [2021-06-05 07:00:47,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 20135 states and 77612 transitions. [2021-06-05 07:00:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:47,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:47,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:47,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:47,407 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:47,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:47,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1048850995, now seen corresponding path program 125 times [2021-06-05 07:00:47,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:47,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349383200] [2021-06-05 07:00:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:47,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:47,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349383200] [2021-06-05 07:00:47,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349383200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:47,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795804262] [2021-06-05 07:00:47,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:47,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:00:47,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:47,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:00:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:00:47,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795804262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:47,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:47,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 07:00:47,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686740549] [2021-06-05 07:00:47,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:00:47,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:47,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:00:47,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:00:47,541 INFO L87 Difference]: Start difference. First operand 20135 states and 77612 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:47,772 INFO L93 Difference]: Finished difference Result 25115 states and 93450 transitions. [2021-06-05 07:00:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:00:47,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:47,834 INFO L225 Difference]: With dead ends: 25115 [2021-06-05 07:00:47,834 INFO L226 Difference]: Without dead ends: 25115 [2021-06-05 07:00:47,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:00:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25115 states. [2021-06-05 07:00:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25115 to 20445. [2021-06-05 07:00:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20445 states, 20444 states have (on average 3.845871649383682) internal successors, (78625), 20444 states have internal predecessors, (78625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20445 states to 20445 states and 78625 transitions. [2021-06-05 07:00:48,265 INFO L78 Accepts]: Start accepts. Automaton has 20445 states and 78625 transitions. Word has length 28 [2021-06-05 07:00:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:48,265 INFO L482 AbstractCegarLoop]: Abstraction has 20445 states and 78625 transitions. [2021-06-05 07:00:48,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 20445 states and 78625 transitions. [2021-06-05 07:00:48,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:48,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:48,300 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:48,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3589,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:48,501 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:48,501 INFO L82 PathProgramCache]: Analyzing trace with hash -118651251, now seen corresponding path program 126 times [2021-06-05 07:00:48,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:48,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405657601] [2021-06-05 07:00:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:48,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:48,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405657601] [2021-06-05 07:00:48,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405657601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:48,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602091574] [2021-06-05 07:00:48,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:48,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:48,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:48,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:48,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:00:48,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602091574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:48,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:48,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:00:48,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405609934] [2021-06-05 07:00:48,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:48,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:48,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:48,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:48,636 INFO L87 Difference]: Start difference. First operand 20445 states and 78625 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:49,499 INFO L93 Difference]: Finished difference Result 30869 states and 113082 transitions. [2021-06-05 07:00:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:00:49,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:49,576 INFO L225 Difference]: With dead ends: 30869 [2021-06-05 07:00:49,577 INFO L226 Difference]: Without dead ends: 30869 [2021-06-05 07:00:49,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 464.8ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:00:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30869 states. [2021-06-05 07:00:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30869 to 22051. [2021-06-05 07:00:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22051 states, 22050 states have (on average 3.8592743764172335) internal successors, (85097), 22050 states have internal predecessors, (85097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22051 states to 22051 states and 85097 transitions. [2021-06-05 07:00:50,106 INFO L78 Accepts]: Start accepts. Automaton has 22051 states and 85097 transitions. Word has length 28 [2021-06-05 07:00:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:50,106 INFO L482 AbstractCegarLoop]: Abstraction has 22051 states and 85097 transitions. [2021-06-05 07:00:50,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 22051 states and 85097 transitions. [2021-06-05 07:00:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:50,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:50,292 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:50,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-06-05 07:00:50,493 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:50,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:50,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1808445805, now seen corresponding path program 127 times [2021-06-05 07:00:50,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:50,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965098660] [2021-06-05 07:00:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:50,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:50,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965098660] [2021-06-05 07:00:50,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965098660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:50,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158307229] [2021-06-05 07:00:50,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:50,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:50,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:00:50,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158307229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:50,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:50,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:00:50,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060707402] [2021-06-05 07:00:50,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:50,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:50,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:50,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:50,627 INFO L87 Difference]: Start difference. First operand 22051 states and 85097 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:51,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:51,364 INFO L93 Difference]: Finished difference Result 29083 states and 108458 transitions. [2021-06-05 07:00:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:00:51,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:51,430 INFO L225 Difference]: With dead ends: 29083 [2021-06-05 07:00:51,430 INFO L226 Difference]: Without dead ends: 29071 [2021-06-05 07:00:51,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:00:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29071 states. [2021-06-05 07:00:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29071 to 22169. [2021-06-05 07:00:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22169 states, 22168 states have (on average 3.854655359076146) internal successors, (85450), 22168 states have internal predecessors, (85450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22169 states to 22169 states and 85450 transitions. [2021-06-05 07:00:51,942 INFO L78 Accepts]: Start accepts. Automaton has 22169 states and 85450 transitions. Word has length 28 [2021-06-05 07:00:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:51,942 INFO L482 AbstractCegarLoop]: Abstraction has 22169 states and 85450 transitions. [2021-06-05 07:00:51,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 22169 states and 85450 transitions. [2021-06-05 07:00:51,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:51,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:51,976 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:52,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3591 [2021-06-05 07:00:52,177 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1705760401, now seen corresponding path program 128 times [2021-06-05 07:00:52,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:52,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980421415] [2021-06-05 07:00:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:52,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:52,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980421415] [2021-06-05 07:00:52,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980421415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:52,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113608717] [2021-06-05 07:00:52,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:52,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:52,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:52,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:00:52,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:52,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113608717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:52,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:52,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:00:52,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780749732] [2021-06-05 07:00:52,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:00:52,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:52,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:00:52,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:00:52,292 INFO L87 Difference]: Start difference. First operand 22169 states and 85450 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:52,541 INFO L93 Difference]: Finished difference Result 25428 states and 96407 transitions. [2021-06-05 07:00:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:00:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:52,608 INFO L225 Difference]: With dead ends: 25428 [2021-06-05 07:00:52,608 INFO L226 Difference]: Without dead ends: 25428 [2021-06-05 07:00:52,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:00:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25428 states. [2021-06-05 07:00:53,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25428 to 22972. [2021-06-05 07:00:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22972 states, 22971 states have (on average 3.84959296504288) internal successors, (88429), 22971 states have internal predecessors, (88429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22972 states to 22972 states and 88429 transitions. [2021-06-05 07:00:53,132 INFO L78 Accepts]: Start accepts. Automaton has 22972 states and 88429 transitions. Word has length 28 [2021-06-05 07:00:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:53,132 INFO L482 AbstractCegarLoop]: Abstraction has 22972 states and 88429 transitions. [2021-06-05 07:00:53,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 22972 states and 88429 transitions. [2021-06-05 07:00:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:53,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:53,174 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:53,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3592 [2021-06-05 07:00:53,375 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2145545327, now seen corresponding path program 129 times [2021-06-05 07:00:53,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:53,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199138395] [2021-06-05 07:00:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:53,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:53,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199138395] [2021-06-05 07:00:53,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199138395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:53,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919537889] [2021-06-05 07:00:53,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:53,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:00:53,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:53,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:53,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:53,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919537889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:53,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:53,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:00:53,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335644357] [2021-06-05 07:00:53,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:53,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:53,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:53,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:53,521 INFO L87 Difference]: Start difference. First operand 22972 states and 88429 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:54,308 INFO L93 Difference]: Finished difference Result 30839 states and 113843 transitions. [2021-06-05 07:00:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:00:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:54,381 INFO L225 Difference]: With dead ends: 30839 [2021-06-05 07:00:54,381 INFO L226 Difference]: Without dead ends: 30839 [2021-06-05 07:00:54,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:00:54,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30839 states. [2021-06-05 07:00:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30839 to 24204. [2021-06-05 07:00:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24204 states, 24203 states have (on average 3.8153534685782753) internal successors, (92343), 24203 states have internal predecessors, (92343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24204 states to 24204 states and 92343 transitions. [2021-06-05 07:00:55,213 INFO L78 Accepts]: Start accepts. Automaton has 24204 states and 92343 transitions. Word has length 28 [2021-06-05 07:00:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:55,214 INFO L482 AbstractCegarLoop]: Abstraction has 24204 states and 92343 transitions. [2021-06-05 07:00:55,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 24204 states and 92343 transitions. [2021-06-05 07:00:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:55,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:55,259 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:55,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-06-05 07:00:55,459 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:55,459 INFO L82 PathProgramCache]: Analyzing trace with hash -414511489, now seen corresponding path program 130 times [2021-06-05 07:00:55,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:55,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352174437] [2021-06-05 07:00:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:55,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:55,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352174437] [2021-06-05 07:00:55,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352174437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:55,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380629254] [2021-06-05 07:00:55,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:55,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:55,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:55,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:55,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:55,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380629254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:55,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:55,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:00:55,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404090750] [2021-06-05 07:00:55,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:55,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:55,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:55,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:55,597 INFO L87 Difference]: Start difference. First operand 24204 states and 92343 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:56,241 INFO L93 Difference]: Finished difference Result 29939 states and 111457 transitions. [2021-06-05 07:00:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:00:56,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:56,316 INFO L225 Difference]: With dead ends: 29939 [2021-06-05 07:00:56,316 INFO L226 Difference]: Without dead ends: 29931 [2021-06-05 07:00:56,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:00:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29931 states. [2021-06-05 07:00:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29931 to 24026. [2021-06-05 07:00:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.821685744016649) internal successors, (91816), 24025 states have internal predecessors, (91816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 91816 transitions. [2021-06-05 07:00:56,891 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 91816 transitions. Word has length 28 [2021-06-05 07:00:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:56,891 INFO L482 AbstractCegarLoop]: Abstraction has 24026 states and 91816 transitions. [2021-06-05 07:00:56,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 91816 transitions. [2021-06-05 07:00:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:56,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:56,936 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:57,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3594,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:57,136 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash 44544553, now seen corresponding path program 131 times [2021-06-05 07:00:57,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:57,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80702669] [2021-06-05 07:00:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:57,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:57,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80702669] [2021-06-05 07:00:57,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80702669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:57,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062818368] [2021-06-05 07:00:57,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:57,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:00:57,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:57,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:57,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:57,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062818368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:57,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:57,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:00:57,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006075096] [2021-06-05 07:00:57,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:57,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:57,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:57,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:57,262 INFO L87 Difference]: Start difference. First operand 24026 states and 91816 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:58,045 INFO L93 Difference]: Finished difference Result 31774 states and 117062 transitions. [2021-06-05 07:00:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:00:58,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:58,130 INFO L225 Difference]: With dead ends: 31774 [2021-06-05 07:00:58,130 INFO L226 Difference]: Without dead ends: 31774 [2021-06-05 07:00:58,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:00:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31774 states. [2021-06-05 07:00:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31774 to 25062. [2021-06-05 07:00:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25062 states, 25061 states have (on average 3.796416743146722) internal successors, (95142), 25061 states have internal predecessors, (95142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25062 states to 25062 states and 95142 transitions. [2021-06-05 07:00:58,775 INFO L78 Accepts]: Start accepts. Automaton has 25062 states and 95142 transitions. Word has length 28 [2021-06-05 07:00:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:58,775 INFO L482 AbstractCegarLoop]: Abstraction has 25062 states and 95142 transitions. [2021-06-05 07:00:58,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 25062 states and 95142 transitions. [2021-06-05 07:00:58,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:58,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:58,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:59,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 07:00:59,027 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:59,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1038478103, now seen corresponding path program 132 times [2021-06-05 07:00:59,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:59,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306988990] [2021-06-05 07:00:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:59,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:59,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306988990] [2021-06-05 07:00:59,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306988990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:59,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328740123] [2021-06-05 07:00:59,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:59,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:59,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:59,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:59,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328740123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:59,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:59,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:00:59,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791666542] [2021-06-05 07:00:59,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:00:59,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:59,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:00:59,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:00:59,158 INFO L87 Difference]: Start difference. First operand 25062 states and 95142 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:59,710 INFO L93 Difference]: Finished difference Result 30731 states and 115778 transitions. [2021-06-05 07:00:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:00:59,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:59,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:59,787 INFO L225 Difference]: With dead ends: 30731 [2021-06-05 07:00:59,788 INFO L226 Difference]: Without dead ends: 30718 [2021-06-05 07:00:59,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:00:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30718 states. [2021-06-05 07:01:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30718 to 29185. [2021-06-05 07:01:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29185 states, 29184 states have (on average 3.8150356359649122) internal successors, (111338), 29184 states have internal predecessors, (111338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29185 states to 29185 states and 111338 transitions. [2021-06-05 07:01:00,402 INFO L78 Accepts]: Start accepts. Automaton has 29185 states and 111338 transitions. Word has length 28 [2021-06-05 07:01:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:00,402 INFO L482 AbstractCegarLoop]: Abstraction has 29185 states and 111338 transitions. [2021-06-05 07:01:00,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 29185 states and 111338 transitions. [2021-06-05 07:01:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:00,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:00,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:00,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3596,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:00,680 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:00,680 INFO L82 PathProgramCache]: Analyzing trace with hash 432600015, now seen corresponding path program 133 times [2021-06-05 07:01:00,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:00,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219445094] [2021-06-05 07:01:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:00,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:00,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219445094] [2021-06-05 07:01:00,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219445094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:00,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978006334] [2021-06-05 07:01:00,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:00,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:01:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:00,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978006334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:00,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:00,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:01:00,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596102530] [2021-06-05 07:01:00,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:01:00,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:00,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:01:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:01:00,802 INFO L87 Difference]: Start difference. First operand 29185 states and 111338 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:01,166 INFO L93 Difference]: Finished difference Result 32194 states and 120690 transitions. [2021-06-05 07:01:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:01:01,166 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:01,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:01,246 INFO L225 Difference]: With dead ends: 32194 [2021-06-05 07:01:01,247 INFO L226 Difference]: Without dead ends: 32194 [2021-06-05 07:01:01,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:01:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32194 states. [2021-06-05 07:01:01,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32194 to 28930. [2021-06-05 07:01:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28930 states, 28929 states have (on average 3.8113657575443325) internal successors, (110259), 28929 states have internal predecessors, (110259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28930 states to 28930 states and 110259 transitions. [2021-06-05 07:01:01,916 INFO L78 Accepts]: Start accepts. Automaton has 28930 states and 110259 transitions. Word has length 28 [2021-06-05 07:01:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:01,916 INFO L482 AbstractCegarLoop]: Abstraction has 28930 states and 110259 transitions. [2021-06-05 07:01:01,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand 28930 states and 110259 transitions. [2021-06-05 07:01:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:01,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:01,970 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:02,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:02,170 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:02,171 INFO L82 PathProgramCache]: Analyzing trace with hash 990664297, now seen corresponding path program 134 times [2021-06-05 07:01:02,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:02,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142295810] [2021-06-05 07:01:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:02,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:02,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142295810] [2021-06-05 07:01:02,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142295810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:02,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771727071] [2021-06-05 07:01:02,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:02,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:02,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:02,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:02,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:02,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771727071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:02,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:02,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:01:02,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106536510] [2021-06-05 07:01:02,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:01:02,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:02,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:01:02,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:01:02,289 INFO L87 Difference]: Start difference. First operand 28930 states and 110259 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:02,914 INFO L93 Difference]: Finished difference Result 35356 states and 131587 transitions. [2021-06-05 07:01:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:01:02,915 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:03,013 INFO L225 Difference]: With dead ends: 35356 [2021-06-05 07:01:03,013 INFO L226 Difference]: Without dead ends: 35348 [2021-06-05 07:01:03,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:01:03,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35348 states. [2021-06-05 07:01:03,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35348 to 28896. [2021-06-05 07:01:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28896 states, 28895 states have (on average 3.8118013497144836) internal successors, (110142), 28895 states have internal predecessors, (110142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28896 states to 28896 states and 110142 transitions. [2021-06-05 07:01:03,943 INFO L78 Accepts]: Start accepts. Automaton has 28896 states and 110142 transitions. Word has length 28 [2021-06-05 07:01:03,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:03,943 INFO L482 AbstractCegarLoop]: Abstraction has 28896 states and 110142 transitions. [2021-06-05 07:01:03,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:03,943 INFO L276 IsEmpty]: Start isEmpty. Operand 28896 states and 110142 transitions. [2021-06-05 07:01:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:03,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:03,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:04,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:04,193 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:04,194 INFO L82 PathProgramCache]: Analyzing trace with hash -896097405, now seen corresponding path program 135 times [2021-06-05 07:01:04,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:04,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726068299] [2021-06-05 07:01:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:04,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:04,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726068299] [2021-06-05 07:01:04,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726068299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:04,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921801004] [2021-06-05 07:01:04,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:04,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:01:04,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:04,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:01:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:04,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921801004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:04,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:04,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:01:04,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520581565] [2021-06-05 07:01:04,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:01:04,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:04,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:01:04,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:01:04,309 INFO L87 Difference]: Start difference. First operand 28896 states and 110142 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:04,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:04,747 INFO L93 Difference]: Finished difference Result 31746 states and 119616 transitions. [2021-06-05 07:01:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:01:04,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:04,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:04,828 INFO L225 Difference]: With dead ends: 31746 [2021-06-05 07:01:04,829 INFO L226 Difference]: Without dead ends: 31746 [2021-06-05 07:01:04,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:01:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31746 states. [2021-06-05 07:01:05,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31746 to 29428. [2021-06-05 07:01:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29428 states, 29427 states have (on average 3.81031025928569) internal successors, (112126), 29427 states have internal predecessors, (112126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:05,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29428 states to 29428 states and 112126 transitions. [2021-06-05 07:01:05,517 INFO L78 Accepts]: Start accepts. Automaton has 29428 states and 112126 transitions. Word has length 28 [2021-06-05 07:01:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:05,517 INFO L482 AbstractCegarLoop]: Abstraction has 29428 states and 112126 transitions. [2021-06-05 07:01:05,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 29428 states and 112126 transitions. [2021-06-05 07:01:05,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:05,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:05,794 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:06,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3599,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:06,018 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash 68962157, now seen corresponding path program 136 times [2021-06-05 07:01:06,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:06,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059351982] [2021-06-05 07:01:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:06,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:06,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059351982] [2021-06-05 07:01:06,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059351982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:06,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812176703] [2021-06-05 07:01:06,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:06,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:06,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:06,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:06,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:06,275 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 07:01:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:06,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812176703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:06,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:06,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:01:06,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072721989] [2021-06-05 07:01:06,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:01:06,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:06,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:01:06,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:01:06,297 INFO L87 Difference]: Start difference. First operand 29428 states and 112126 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:06,991 INFO L93 Difference]: Finished difference Result 36274 states and 134973 transitions. [2021-06-05 07:01:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:01:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:07,088 INFO L225 Difference]: With dead ends: 36274 [2021-06-05 07:01:07,088 INFO L226 Difference]: Without dead ends: 36250 [2021-06-05 07:01:07,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:01:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36250 states. [2021-06-05 07:01:07,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36250 to 29600. [2021-06-05 07:01:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29600 states, 29599 states have (on average 3.8062096692455825) internal successors, (112660), 29599 states have internal predecessors, (112660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:08,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29600 states to 29600 states and 112660 transitions. [2021-06-05 07:01:08,009 INFO L78 Accepts]: Start accepts. Automaton has 29600 states and 112660 transitions. Word has length 28 [2021-06-05 07:01:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:08,009 INFO L482 AbstractCegarLoop]: Abstraction has 29600 states and 112660 transitions. [2021-06-05 07:01:08,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 29600 states and 112660 transitions. [2021-06-05 07:01:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:08,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:08,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:08,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3600 [2021-06-05 07:01:08,305 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:08,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1253949625, now seen corresponding path program 137 times [2021-06-05 07:01:08,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:08,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115336285] [2021-06-05 07:01:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:08,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:08,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115336285] [2021-06-05 07:01:08,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115336285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:08,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132232075] [2021-06-05 07:01:08,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:08,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:01:08,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:08,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:01:08,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:08,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132232075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:08,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:08,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 07:01:08,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413620495] [2021-06-05 07:01:08,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:01:08,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:01:08,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:01:08,430 INFO L87 Difference]: Start difference. First operand 29600 states and 112660 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:09,026 INFO L93 Difference]: Finished difference Result 32160 states and 121084 transitions. [2021-06-05 07:01:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:01:09,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:09,101 INFO L225 Difference]: With dead ends: 32160 [2021-06-05 07:01:09,101 INFO L226 Difference]: Without dead ends: 32160 [2021-06-05 07:01:09,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:01:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32160 states. [2021-06-05 07:01:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32160 to 29526. [2021-06-05 07:01:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29526 states, 29525 states have (on average 3.807078746824725) internal successors, (112404), 29525 states have internal predecessors, (112404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29526 states to 29526 states and 112404 transitions. [2021-06-05 07:01:09,811 INFO L78 Accepts]: Start accepts. Automaton has 29526 states and 112404 transitions. Word has length 28 [2021-06-05 07:01:09,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:09,811 INFO L482 AbstractCegarLoop]: Abstraction has 29526 states and 112404 transitions. [2021-06-05 07:01:09,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:09,811 INFO L276 IsEmpty]: Start isEmpty. Operand 29526 states and 112404 transitions. [2021-06-05 07:01:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:09,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:09,860 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:10,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3601,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:10,061 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:10,061 INFO L82 PathProgramCache]: Analyzing trace with hash -719397267, now seen corresponding path program 138 times [2021-06-05 07:01:10,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:10,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268007424] [2021-06-05 07:01:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:10,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:10,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268007424] [2021-06-05 07:01:10,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268007424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:10,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513488713] [2021-06-05 07:01:10,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:10,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:01:10,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:10,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:10,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:10,290 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 07:01:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:10,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513488713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:10,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:10,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:01:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775285172] [2021-06-05 07:01:10,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:01:10,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:01:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:01:10,341 INFO L87 Difference]: Start difference. First operand 29526 states and 112404 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:11,211 INFO L93 Difference]: Finished difference Result 36197 states and 134714 transitions. [2021-06-05 07:01:11,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:01:11,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:11,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:11,314 INFO L225 Difference]: With dead ends: 36197 [2021-06-05 07:01:11,314 INFO L226 Difference]: Without dead ends: 36157 [2021-06-05 07:01:11,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:01:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36157 states. [2021-06-05 07:01:12,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36157 to 29682. [2021-06-05 07:01:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29682 states, 29681 states have (on average 3.8031737475152454) internal successors, (112882), 29681 states have internal predecessors, (112882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29682 states to 29682 states and 112882 transitions. [2021-06-05 07:01:12,148 INFO L78 Accepts]: Start accepts. Automaton has 29682 states and 112882 transitions. Word has length 28 [2021-06-05 07:01:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:12,148 INFO L482 AbstractCegarLoop]: Abstraction has 29682 states and 112882 transitions. [2021-06-05 07:01:12,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 29682 states and 112882 transitions. [2021-06-05 07:01:12,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:12,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:12,204 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:12,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3602 [2021-06-05 07:01:12,405 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:12,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:12,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1643440553, now seen corresponding path program 139 times [2021-06-05 07:01:12,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:12,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657266704] [2021-06-05 07:01:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:12,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:12,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657266704] [2021-06-05 07:01:12,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657266704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:12,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618470705] [2021-06-05 07:01:12,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:12,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:12,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:12,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618470705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:12,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:12,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:12,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379658789] [2021-06-05 07:01:12,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:12,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:12,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:12,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:12,571 INFO L87 Difference]: Start difference. First operand 29682 states and 112882 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:14,300 INFO L93 Difference]: Finished difference Result 67954 states and 250170 transitions. [2021-06-05 07:01:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:01:14,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:14,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:14,503 INFO L225 Difference]: With dead ends: 67954 [2021-06-05 07:01:14,503 INFO L226 Difference]: Without dead ends: 67954 [2021-06-05 07:01:14,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 739.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:01:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67954 states. [2021-06-05 07:01:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67954 to 37388. [2021-06-05 07:01:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37388 states, 37387 states have (on average 3.884772781983042) internal successors, (145240), 37387 states have internal predecessors, (145240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37388 states to 37388 states and 145240 transitions. [2021-06-05 07:01:15,845 INFO L78 Accepts]: Start accepts. Automaton has 37388 states and 145240 transitions. Word has length 28 [2021-06-05 07:01:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:15,845 INFO L482 AbstractCegarLoop]: Abstraction has 37388 states and 145240 transitions. [2021-06-05 07:01:15,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:15,845 INFO L276 IsEmpty]: Start isEmpty. Operand 37388 states and 145240 transitions. [2021-06-05 07:01:15,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:15,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:15,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:16,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3603,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:16,114 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:16,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1122622099, now seen corresponding path program 140 times [2021-06-05 07:01:16,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:16,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966611725] [2021-06-05 07:01:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:16,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:16,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966611725] [2021-06-05 07:01:16,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966611725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:16,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131954966] [2021-06-05 07:01:16,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:16,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:16,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:16,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:16,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:16,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131954966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:16,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:16,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:16,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307643471] [2021-06-05 07:01:16,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:16,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:16,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:16,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:16,281 INFO L87 Difference]: Start difference. First operand 37388 states and 145240 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:18,222 INFO L93 Difference]: Finished difference Result 67327 states and 248511 transitions. [2021-06-05 07:01:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:01:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:18,422 INFO L225 Difference]: With dead ends: 67327 [2021-06-05 07:01:18,422 INFO L226 Difference]: Without dead ends: 67327 [2021-06-05 07:01:18,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 748.7ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:01:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67327 states. [2021-06-05 07:01:19,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67327 to 37385. [2021-06-05 07:01:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37384 states have (on average 3.8847100363791998) internal successors, (145226), 37384 states have internal predecessors, (145226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 145226 transitions. [2021-06-05 07:01:20,007 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 145226 transitions. Word has length 28 [2021-06-05 07:01:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:20,007 INFO L482 AbstractCegarLoop]: Abstraction has 37385 states and 145226 transitions. [2021-06-05 07:01:20,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 145226 transitions. [2021-06-05 07:01:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:20,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:20,080 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:20,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3604,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:20,281 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1038046775, now seen corresponding path program 141 times [2021-06-05 07:01:20,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:20,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450189881] [2021-06-05 07:01:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:20,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:20,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450189881] [2021-06-05 07:01:20,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450189881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:20,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019174501] [2021-06-05 07:01:20,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:20,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:01:20,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:20,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:20,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019174501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:20,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:20,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:01:20,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930790379] [2021-06-05 07:01:20,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:01:20,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:20,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:01:20,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:01:20,447 INFO L87 Difference]: Start difference. First operand 37385 states and 145226 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:21,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:21,891 INFO L93 Difference]: Finished difference Result 62746 states and 233002 transitions. [2021-06-05 07:01:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:01:21,892 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:21,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:22,075 INFO L225 Difference]: With dead ends: 62746 [2021-06-05 07:01:22,075 INFO L226 Difference]: Without dead ends: 62746 [2021-06-05 07:01:22,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 628.1ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:01:22,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62746 states. [2021-06-05 07:01:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62746 to 37407. [2021-06-05 07:01:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8850184462385715) internal successors, (145323), 37406 states have internal predecessors, (145323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145323 transitions. [2021-06-05 07:01:23,626 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145323 transitions. Word has length 28 [2021-06-05 07:01:23,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:23,626 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145323 transitions. [2021-06-05 07:01:23,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:23,626 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145323 transitions. [2021-06-05 07:01:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:23,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:23,690 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:23,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3605 [2021-06-05 07:01:23,890 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:23,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:23,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2110363749, now seen corresponding path program 142 times [2021-06-05 07:01:23,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:23,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422657412] [2021-06-05 07:01:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:23,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:23,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422657412] [2021-06-05 07:01:23,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422657412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:23,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202789552] [2021-06-05 07:01:23,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:23,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:23,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:23,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:23,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:24,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202789552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:24,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:24,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:01:24,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623223057] [2021-06-05 07:01:24,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:01:24,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:01:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:01:24,042 INFO L87 Difference]: Start difference. First operand 37407 states and 145323 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:25,378 INFO L93 Difference]: Finished difference Result 61875 states and 230752 transitions. [2021-06-05 07:01:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:01:25,378 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:25,551 INFO L225 Difference]: With dead ends: 61875 [2021-06-05 07:01:25,551 INFO L226 Difference]: Without dead ends: 61867 [2021-06-05 07:01:25,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:01:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61867 states. [2021-06-05 07:01:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61867 to 37407. [2021-06-05 07:01:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8848580441640377) internal successors, (145317), 37406 states have internal predecessors, (145317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145317 transitions. [2021-06-05 07:01:27,260 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145317 transitions. Word has length 28 [2021-06-05 07:01:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:27,260 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145317 transitions. [2021-06-05 07:01:27,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145317 transitions. [2021-06-05 07:01:27,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:27,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:27,346 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:27,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3606,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:27,546 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:27,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:27,546 INFO L82 PathProgramCache]: Analyzing trace with hash 104546025, now seen corresponding path program 143 times [2021-06-05 07:01:27,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:27,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548110586] [2021-06-05 07:01:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:27,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:27,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548110586] [2021-06-05 07:01:27,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548110586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:27,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223922219] [2021-06-05 07:01:27,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:27,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:01:27,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:27,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:27,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223922219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:27,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:27,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:27,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443443342] [2021-06-05 07:01:27,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:27,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:27,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:27,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:27,710 INFO L87 Difference]: Start difference. First operand 37407 states and 145317 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:28,954 INFO L93 Difference]: Finished difference Result 61558 states and 229893 transitions. [2021-06-05 07:01:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:01:28,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:29,392 INFO L225 Difference]: With dead ends: 61558 [2021-06-05 07:01:29,393 INFO L226 Difference]: Without dead ends: 61558 [2021-06-05 07:01:29,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 602.3ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:01:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61558 states. [2021-06-05 07:01:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61558 to 37415. [2021-06-05 07:01:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.8849361201689208) internal successors, (145351), 37414 states have internal predecessors, (145351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145351 transitions. [2021-06-05 07:01:30,575 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145351 transitions. Word has length 28 [2021-06-05 07:01:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:30,575 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145351 transitions. [2021-06-05 07:01:30,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145351 transitions. [2021-06-05 07:01:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:30,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:30,635 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:30,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3607 [2021-06-05 07:01:30,835 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:30,835 INFO L82 PathProgramCache]: Analyzing trace with hash -950831369, now seen corresponding path program 144 times [2021-06-05 07:01:30,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:30,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323414599] [2021-06-05 07:01:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:30,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:30,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323414599] [2021-06-05 07:01:30,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323414599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:30,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487668321] [2021-06-05 07:01:30,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:30,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:01:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:30,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:31,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487668321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:31,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:31,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:31,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064278130] [2021-06-05 07:01:31,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:31,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:31,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:31,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:31,011 INFO L87 Difference]: Start difference. First operand 37415 states and 145351 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:32,395 INFO L93 Difference]: Finished difference Result 61347 states and 229367 transitions. [2021-06-05 07:01:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:01:32,396 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:32,573 INFO L225 Difference]: With dead ends: 61347 [2021-06-05 07:01:32,574 INFO L226 Difference]: Without dead ends: 61339 [2021-06-05 07:01:32,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 757.1ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:01:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61339 states. [2021-06-05 07:01:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61339 to 37415. [2021-06-05 07:01:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.884882664243331) internal successors, (145349), 37414 states have internal predecessors, (145349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:34,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145349 transitions. [2021-06-05 07:01:34,024 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145349 transitions. Word has length 28 [2021-06-05 07:01:34,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:34,024 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145349 transitions. [2021-06-05 07:01:34,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:34,024 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145349 transitions. [2021-06-05 07:01:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:34,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:34,091 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:34,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-06-05 07:01:34,291 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:34,291 INFO L82 PathProgramCache]: Analyzing trace with hash 401579921, now seen corresponding path program 145 times [2021-06-05 07:01:34,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:34,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972318092] [2021-06-05 07:01:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:34,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:34,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972318092] [2021-06-05 07:01:34,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972318092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:34,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118588179] [2021-06-05 07:01:34,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:34,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:34,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:34,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118588179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:34,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:34,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:01:34,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596631080] [2021-06-05 07:01:34,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:34,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:34,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:34,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:34,464 INFO L87 Difference]: Start difference. First operand 37415 states and 145349 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:35,919 INFO L93 Difference]: Finished difference Result 60787 states and 225952 transitions. [2021-06-05 07:01:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:01:35,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:36,071 INFO L225 Difference]: With dead ends: 60787 [2021-06-05 07:01:36,072 INFO L226 Difference]: Without dead ends: 60787 [2021-06-05 07:01:36,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 665.8ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 07:01:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60787 states. [2021-06-05 07:01:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60787 to 40214. [2021-06-05 07:01:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40214 states, 40213 states have (on average 3.8890159898540273) internal successors, (156389), 40213 states have internal predecessors, (156389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40214 states to 40214 states and 156389 transitions. [2021-06-05 07:01:37,645 INFO L78 Accepts]: Start accepts. Automaton has 40214 states and 156389 transitions. Word has length 28 [2021-06-05 07:01:37,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:37,645 INFO L482 AbstractCegarLoop]: Abstraction has 40214 states and 156389 transitions. [2021-06-05 07:01:37,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 40214 states and 156389 transitions. [2021-06-05 07:01:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:37,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:37,726 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:37,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-06-05 07:01:37,926 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:37,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:37,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1473896895, now seen corresponding path program 146 times [2021-06-05 07:01:37,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:37,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902246759] [2021-06-05 07:01:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:37,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:37,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902246759] [2021-06-05 07:01:37,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902246759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:37,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880261271] [2021-06-05 07:01:37,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:37,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:37,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:37,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:38,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880261271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:38,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:38,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:01:38,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317642096] [2021-06-05 07:01:38,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:38,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:38,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:38,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:38,078 INFO L87 Difference]: Start difference. First operand 40214 states and 156389 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:39,261 INFO L93 Difference]: Finished difference Result 60310 states and 224694 transitions. [2021-06-05 07:01:39,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:01:39,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:39,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:39,757 INFO L225 Difference]: With dead ends: 60310 [2021-06-05 07:01:39,758 INFO L226 Difference]: Without dead ends: 60302 [2021-06-05 07:01:39,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 553.0ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:01:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60302 states. [2021-06-05 07:01:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60302 to 39928. [2021-06-05 07:01:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39928 states, 39927 states have (on average 3.8946577503944697) internal successors, (155502), 39927 states have internal predecessors, (155502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39928 states to 39928 states and 155502 transitions. [2021-06-05 07:01:41,158 INFO L78 Accepts]: Start accepts. Automaton has 39928 states and 155502 transitions. Word has length 28 [2021-06-05 07:01:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:41,158 INFO L482 AbstractCegarLoop]: Abstraction has 39928 states and 155502 transitions. [2021-06-05 07:01:41,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 39928 states and 155502 transitions. [2021-06-05 07:01:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:41,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:41,224 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:41,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:41,424 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:41,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1560233875, now seen corresponding path program 147 times [2021-06-05 07:01:41,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:41,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004634937] [2021-06-05 07:01:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:41,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:41,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004634937] [2021-06-05 07:01:41,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004634937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:41,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499293232] [2021-06-05 07:01:41,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:41,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:01:41,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:41,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:41,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499293232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:41,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:41,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:01:41,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885533941] [2021-06-05 07:01:41,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:41,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:41,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:41,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:41,567 INFO L87 Difference]: Start difference. First operand 39928 states and 155502 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:42,731 INFO L93 Difference]: Finished difference Result 58857 states and 220695 transitions. [2021-06-05 07:01:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:01:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:42,957 INFO L225 Difference]: With dead ends: 58857 [2021-06-05 07:01:42,957 INFO L226 Difference]: Without dead ends: 58833 [2021-06-05 07:01:42,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:01:43,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58833 states. [2021-06-05 07:01:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58833 to 39834. [2021-06-05 07:01:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39834 states, 39833 states have (on average 3.894635101548967) internal successors, (155135), 39833 states have internal predecessors, (155135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39834 states to 39834 states and 155135 transitions. [2021-06-05 07:01:44,504 INFO L78 Accepts]: Start accepts. Automaton has 39834 states and 155135 transitions. Word has length 28 [2021-06-05 07:01:44,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:44,505 INFO L482 AbstractCegarLoop]: Abstraction has 39834 states and 155135 transitions. [2021-06-05 07:01:44,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:44,505 INFO L276 IsEmpty]: Start isEmpty. Operand 39834 states and 155135 transitions. [2021-06-05 07:01:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:44,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:44,591 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:44,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3611,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:44,794 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:44,794 INFO L82 PathProgramCache]: Analyzing trace with hash -887947539, now seen corresponding path program 148 times [2021-06-05 07:01:44,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:44,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687428601] [2021-06-05 07:01:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:44,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:44,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687428601] [2021-06-05 07:01:44,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687428601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:44,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136368914] [2021-06-05 07:01:44,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:44,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:44,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:44,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:44,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:44,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136368914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:44,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:44,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:44,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852428829] [2021-06-05 07:01:44,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:44,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:44,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:44,979 INFO L87 Difference]: Start difference. First operand 39834 states and 155135 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:46,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:46,492 INFO L93 Difference]: Finished difference Result 60084 states and 224060 transitions. [2021-06-05 07:01:46,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 07:01:46,493 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:46,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:46,665 INFO L225 Difference]: With dead ends: 60084 [2021-06-05 07:01:46,666 INFO L226 Difference]: Without dead ends: 60084 [2021-06-05 07:01:46,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 672.7ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:01:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60084 states. [2021-06-05 07:01:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60084 to 39930. [2021-06-05 07:01:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39930 states, 39929 states have (on average 3.8931353151844523) internal successors, (155449), 39929 states have internal predecessors, (155449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39930 states to 39930 states and 155449 transitions. [2021-06-05 07:01:48,019 INFO L78 Accepts]: Start accepts. Automaton has 39930 states and 155449 transitions. Word has length 28 [2021-06-05 07:01:48,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:48,019 INFO L482 AbstractCegarLoop]: Abstraction has 39930 states and 155449 transitions. [2021-06-05 07:01:48,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 39930 states and 155449 transitions. [2021-06-05 07:01:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:48,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:48,087 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:48,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3612 [2021-06-05 07:01:48,287 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:48,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:48,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1943324933, now seen corresponding path program 149 times [2021-06-05 07:01:48,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:48,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078155891] [2021-06-05 07:01:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:48,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:48,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078155891] [2021-06-05 07:01:48,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078155891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:48,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602200025] [2021-06-05 07:01:48,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:48,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:01:48,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:48,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:48,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:48,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602200025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:48,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:48,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:48,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513676132] [2021-06-05 07:01:48,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:48,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:48,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:48,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:48,448 INFO L87 Difference]: Start difference. First operand 39930 states and 155449 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:49,748 INFO L93 Difference]: Finished difference Result 59771 states and 223172 transitions. [2021-06-05 07:01:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:01:49,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:49,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:49,915 INFO L225 Difference]: With dead ends: 59771 [2021-06-05 07:01:49,916 INFO L226 Difference]: Without dead ends: 59763 [2021-06-05 07:01:49,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 523.7ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:01:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59763 states. [2021-06-05 07:01:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59763 to 39858. [2021-06-05 07:01:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39858 states, 39857 states have (on average 3.894598188523973) internal successors, (155227), 39857 states have internal predecessors, (155227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39858 states to 39858 states and 155227 transitions. [2021-06-05 07:01:51,344 INFO L78 Accepts]: Start accepts. Automaton has 39858 states and 155227 transitions. Word has length 28 [2021-06-05 07:01:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:51,344 INFO L482 AbstractCegarLoop]: Abstraction has 39858 states and 155227 transitions. [2021-06-05 07:01:51,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 39858 states and 155227 transitions. [2021-06-05 07:01:51,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:51,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:51,414 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:51,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3613,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:51,617 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:51,617 INFO L82 PathProgramCache]: Analyzing trace with hash -460189995, now seen corresponding path program 150 times [2021-06-05 07:01:51,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:51,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219171490] [2021-06-05 07:01:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:51,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219171490] [2021-06-05 07:01:51,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219171490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560954144] [2021-06-05 07:01:51,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:51,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:01:51,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:51,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:51,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:51,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560954144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:51,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:51,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:01:51,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960383505] [2021-06-05 07:01:51,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:01:51,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:51,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:01:51,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:01:51,776 INFO L87 Difference]: Start difference. First operand 39858 states and 155227 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:52,906 INFO L93 Difference]: Finished difference Result 58502 states and 219661 transitions. [2021-06-05 07:01:52,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:01:52,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:52,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:53,072 INFO L225 Difference]: With dead ends: 58502 [2021-06-05 07:01:53,072 INFO L226 Difference]: Without dead ends: 58478 [2021-06-05 07:01:53,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:01:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58478 states. [2021-06-05 07:01:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58478 to 39834. [2021-06-05 07:01:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39834 states, 39833 states have (on average 3.8947355207993373) internal successors, (155139), 39833 states have internal predecessors, (155139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39834 states to 39834 states and 155139 transitions. [2021-06-05 07:01:54,402 INFO L78 Accepts]: Start accepts. Automaton has 39834 states and 155139 transitions. Word has length 28 [2021-06-05 07:01:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:54,402 INFO L482 AbstractCegarLoop]: Abstraction has 39834 states and 155139 transitions. [2021-06-05 07:01:54,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 39834 states and 155139 transitions. [2021-06-05 07:01:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:54,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:54,465 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:54,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3614 [2021-06-05 07:01:54,666 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash 117906837, now seen corresponding path program 151 times [2021-06-05 07:01:54,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:54,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424791301] [2021-06-05 07:01:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:54,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:54,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424791301] [2021-06-05 07:01:54,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424791301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:54,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568287984] [2021-06-05 07:01:54,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:54,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:54,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:54,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568287984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:54,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:54,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:01:54,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127947460] [2021-06-05 07:01:54,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:54,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:54,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:54,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:54,810 INFO L87 Difference]: Start difference. First operand 39834 states and 155139 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:56,628 INFO L93 Difference]: Finished difference Result 61684 states and 228711 transitions. [2021-06-05 07:01:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 07:01:56,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:56,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:56,792 INFO L225 Difference]: With dead ends: 61684 [2021-06-05 07:01:56,792 INFO L226 Difference]: Without dead ends: 61684 [2021-06-05 07:01:56,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 902.8ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 07:01:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61684 states. [2021-06-05 07:01:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61684 to 44178. [2021-06-05 07:01:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44178 states, 44177 states have (on average 3.844376032777237) internal successors, (169833), 44177 states have internal predecessors, (169833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44178 states to 44178 states and 169833 transitions. [2021-06-05 07:01:58,367 INFO L78 Accepts]: Start accepts. Automaton has 44178 states and 169833 transitions. Word has length 28 [2021-06-05 07:01:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:58,367 INFO L482 AbstractCegarLoop]: Abstraction has 44178 states and 169833 transitions. [2021-06-05 07:01:58,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 44178 states and 169833 transitions. [2021-06-05 07:01:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:58,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:58,440 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:58,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3615,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:58,641 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:58,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1190223811, now seen corresponding path program 152 times [2021-06-05 07:01:58,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:58,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482829994] [2021-06-05 07:01:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:58,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:58,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482829994] [2021-06-05 07:01:58,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482829994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:58,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001883914] [2021-06-05 07:01:58,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:58,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:58,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:58,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:58,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:59,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001883914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:59,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:59,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:01:59,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258600266] [2021-06-05 07:01:59,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:59,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:59,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:59,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:59,053 INFO L87 Difference]: Start difference. First operand 44178 states and 169833 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:00,357 INFO L93 Difference]: Finished difference Result 60908 states and 226590 transitions. [2021-06-05 07:02:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 07:02:00,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:00,513 INFO L225 Difference]: With dead ends: 60908 [2021-06-05 07:02:00,513 INFO L226 Difference]: Without dead ends: 60900 [2021-06-05 07:02:00,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 07:02:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60900 states. [2021-06-05 07:02:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60900 to 43034. [2021-06-05 07:02:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43034 states, 43033 states have (on average 3.86408105407478) internal successors, (166283), 43033 states have internal predecessors, (166283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43034 states to 43034 states and 166283 transitions. [2021-06-05 07:02:02,064 INFO L78 Accepts]: Start accepts. Automaton has 43034 states and 166283 transitions. Word has length 28 [2021-06-05 07:02:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:02,064 INFO L482 AbstractCegarLoop]: Abstraction has 43034 states and 166283 transitions. [2021-06-05 07:02:02,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 43034 states and 166283 transitions. [2021-06-05 07:02:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:02,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:02,129 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:02,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3616 [2021-06-05 07:02:02,330 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:02,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:02,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1843906959, now seen corresponding path program 153 times [2021-06-05 07:02:02,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:02,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371713279] [2021-06-05 07:02:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:02,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:02,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371713279] [2021-06-05 07:02:02,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371713279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:02,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079955390] [2021-06-05 07:02:02,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:02,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:02:02,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:02,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:02,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:02,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079955390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:02,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:02,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:02:02,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278759233] [2021-06-05 07:02:02,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:02:02,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:02,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:02:02,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:02:02,471 INFO L87 Difference]: Start difference. First operand 43034 states and 166283 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:03,657 INFO L93 Difference]: Finished difference Result 59247 states and 221971 transitions. [2021-06-05 07:02:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:02:03,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:03,833 INFO L225 Difference]: With dead ends: 59247 [2021-06-05 07:02:03,834 INFO L226 Difference]: Without dead ends: 59223 [2021-06-05 07:02:03,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:02:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59223 states. [2021-06-05 07:02:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59223 to 43046. [2021-06-05 07:02:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43046 states, 43045 states have (on average 3.8619351841096528) internal successors, (166237), 43045 states have internal predecessors, (166237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43046 states to 43046 states and 166237 transitions. [2021-06-05 07:02:05,611 INFO L78 Accepts]: Start accepts. Automaton has 43046 states and 166237 transitions. Word has length 28 [2021-06-05 07:02:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:05,611 INFO L482 AbstractCegarLoop]: Abstraction has 43046 states and 166237 transitions. [2021-06-05 07:02:05,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 43046 states and 166237 transitions. [2021-06-05 07:02:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:05,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:05,684 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:05,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3617,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:05,884 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:05,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1653229165, now seen corresponding path program 154 times [2021-06-05 07:02:05,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:05,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707447795] [2021-06-05 07:02:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:05,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:05,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707447795] [2021-06-05 07:02:05,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707447795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:05,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109729412] [2021-06-05 07:02:05,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:05,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:05,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:05,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:06,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109729412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:06,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:06,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:02:06,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528047527] [2021-06-05 07:02:06,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:02:06,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:06,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:02:06,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:02:06,022 INFO L87 Difference]: Start difference. First operand 43046 states and 166237 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:07,111 INFO L93 Difference]: Finished difference Result 60535 states and 225583 transitions. [2021-06-05 07:02:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:02:07,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:07,275 INFO L225 Difference]: With dead ends: 60535 [2021-06-05 07:02:07,276 INFO L226 Difference]: Without dead ends: 60495 [2021-06-05 07:02:07,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 552.9ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:02:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60495 states. [2021-06-05 07:02:08,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60495 to 43178. [2021-06-05 07:02:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43178 states, 43177 states have (on average 3.861245570558399) internal successors, (166717), 43177 states have internal predecessors, (166717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43178 states to 43178 states and 166717 transitions. [2021-06-05 07:02:08,975 INFO L78 Accepts]: Start accepts. Automaton has 43178 states and 166717 transitions. Word has length 28 [2021-06-05 07:02:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:08,975 INFO L482 AbstractCegarLoop]: Abstraction has 43178 states and 166717 transitions. [2021-06-05 07:02:08,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:08,976 INFO L276 IsEmpty]: Start isEmpty. Operand 43178 states and 166717 transitions. [2021-06-05 07:02:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:09,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:09,049 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:09,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3618 [2021-06-05 07:02:09,249 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:09,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1707857389, now seen corresponding path program 155 times [2021-06-05 07:02:09,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:09,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999294703] [2021-06-05 07:02:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:09,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999294703] [2021-06-05 07:02:09,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999294703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454154172] [2021-06-05 07:02:09,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:09,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:02:09,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:09,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:09,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:09,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454154172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:09,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:09,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:02:09,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213698326] [2021-06-05 07:02:09,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:09,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:09,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:09,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:09,426 INFO L87 Difference]: Start difference. First operand 43178 states and 166717 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:10,959 INFO L93 Difference]: Finished difference Result 59754 states and 223244 transitions. [2021-06-05 07:02:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 07:02:10,959 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:11,422 INFO L225 Difference]: With dead ends: 59754 [2021-06-05 07:02:11,422 INFO L226 Difference]: Without dead ends: 59754 [2021-06-05 07:02:11,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 892.1ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 07:02:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59754 states. [2021-06-05 07:02:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59754 to 44087. [2021-06-05 07:02:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44087 states, 44086 states have (on average 3.851517488545116) internal successors, (169798), 44086 states have internal predecessors, (169798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44087 states to 44087 states and 169798 transitions. [2021-06-05 07:02:12,816 INFO L78 Accepts]: Start accepts. Automaton has 44087 states and 169798 transitions. Word has length 28 [2021-06-05 07:02:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:12,816 INFO L482 AbstractCegarLoop]: Abstraction has 44087 states and 169798 transitions. [2021-06-05 07:02:12,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 44087 states and 169798 transitions. [2021-06-05 07:02:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:12,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:12,892 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:13,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3619,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:13,097 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash 652479995, now seen corresponding path program 156 times [2021-06-05 07:02:13,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:13,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677190460] [2021-06-05 07:02:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:13,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:13,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677190460] [2021-06-05 07:02:13,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677190460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:13,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729018109] [2021-06-05 07:02:13,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:13,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:02:13,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:13,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:13,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729018109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:13,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:13,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:02:13,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263894849] [2021-06-05 07:02:13,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:13,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:13,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:13,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:13,271 INFO L87 Difference]: Start difference. First operand 44087 states and 169798 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:14,618 INFO L93 Difference]: Finished difference Result 59256 states and 221849 transitions. [2021-06-05 07:02:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:02:14,618 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:15,158 INFO L225 Difference]: With dead ends: 59256 [2021-06-05 07:02:15,158 INFO L226 Difference]: Without dead ends: 59248 [2021-06-05 07:02:15,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 718.6ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:02:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59248 states. [2021-06-05 07:02:16,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59248 to 44011. [2021-06-05 07:02:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44011 states, 44010 states have (on average 3.8528061804135425) internal successors, (169562), 44010 states have internal predecessors, (169562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44011 states to 44011 states and 169562 transitions. [2021-06-05 07:02:16,546 INFO L78 Accepts]: Start accepts. Automaton has 44011 states and 169562 transitions. Word has length 28 [2021-06-05 07:02:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:16,546 INFO L482 AbstractCegarLoop]: Abstraction has 44011 states and 169562 transitions. [2021-06-05 07:02:16,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 44011 states and 169562 transitions. [2021-06-05 07:02:16,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:16,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:16,615 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:16,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:16,815 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:16,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2135614933, now seen corresponding path program 157 times [2021-06-05 07:02:16,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:16,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758638444] [2021-06-05 07:02:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:16,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:16,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758638444] [2021-06-05 07:02:16,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758638444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:16,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732154676] [2021-06-05 07:02:16,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:16,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:16,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732154676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:16,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:16,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:16,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132433989] [2021-06-05 07:02:16,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:16,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:16,974 INFO L87 Difference]: Start difference. First operand 44011 states and 169562 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:18,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:18,103 INFO L93 Difference]: Finished difference Result 58733 states and 220603 transitions. [2021-06-05 07:02:18,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:02:18,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:18,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:18,259 INFO L225 Difference]: With dead ends: 58733 [2021-06-05 07:02:18,259 INFO L226 Difference]: Without dead ends: 58709 [2021-06-05 07:02:18,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:02:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58709 states. [2021-06-05 07:02:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58709 to 43997. [2021-06-05 07:02:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43997 states, 43996 states have (on average 3.8527820710973724) internal successors, (169507), 43996 states have internal predecessors, (169507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43997 states to 43997 states and 169507 transitions. [2021-06-05 07:02:20,095 INFO L78 Accepts]: Start accepts. Automaton has 43997 states and 169507 transitions. Word has length 28 [2021-06-05 07:02:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:20,095 INFO L482 AbstractCegarLoop]: Abstraction has 43997 states and 169507 transitions. [2021-06-05 07:02:20,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 43997 states and 169507 transitions. [2021-06-05 07:02:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:20,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:20,167 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:20,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3621,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:20,367 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash -613280551, now seen corresponding path program 158 times [2021-06-05 07:02:20,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:20,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081696438] [2021-06-05 07:02:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:20,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:20,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081696438] [2021-06-05 07:02:20,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081696438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:20,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753307239] [2021-06-05 07:02:20,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:20,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:20,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:20,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:20,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753307239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:20,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:20,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:02:20,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28568996] [2021-06-05 07:02:20,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:02:20,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:20,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:02:20,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:02:20,514 INFO L87 Difference]: Start difference. First operand 43997 states and 169507 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:21,593 INFO L93 Difference]: Finished difference Result 58515 states and 219910 transitions. [2021-06-05 07:02:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:02:21,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:21,747 INFO L225 Difference]: With dead ends: 58515 [2021-06-05 07:02:21,747 INFO L226 Difference]: Without dead ends: 58475 [2021-06-05 07:02:21,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 561.1ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:02:21,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58475 states. [2021-06-05 07:02:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58475 to 44346. [2021-06-05 07:02:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44346 states, 44345 states have (on average 3.854684857368362) internal successors, (170936), 44345 states have internal predecessors, (170936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44346 states to 44346 states and 170936 transitions. [2021-06-05 07:02:23,459 INFO L78 Accepts]: Start accepts. Automaton has 44346 states and 170936 transitions. Word has length 28 [2021-06-05 07:02:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:23,459 INFO L482 AbstractCegarLoop]: Abstraction has 44346 states and 170936 transitions. [2021-06-05 07:02:23,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:23,459 INFO L276 IsEmpty]: Start isEmpty. Operand 44346 states and 170936 transitions. [2021-06-05 07:02:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:23,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:23,528 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:23,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3622,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:23,729 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1767766801, now seen corresponding path program 159 times [2021-06-05 07:02:23,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:23,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731689490] [2021-06-05 07:02:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:23,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:23,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731689490] [2021-06-05 07:02:23,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731689490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:23,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599773080] [2021-06-05 07:02:23,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:23,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:02:23,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:23,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:23,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:23,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599773080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:23,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:23,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:23,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728563531] [2021-06-05 07:02:23,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:23,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:23,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:23,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:23,896 INFO L87 Difference]: Start difference. First operand 44346 states and 170936 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:25,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:25,197 INFO L93 Difference]: Finished difference Result 71060 states and 264453 transitions. [2021-06-05 07:02:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:02:25,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:25,392 INFO L225 Difference]: With dead ends: 71060 [2021-06-05 07:02:25,393 INFO L226 Difference]: Without dead ends: 71060 [2021-06-05 07:02:25,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 637.0ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:02:25,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71060 states. [2021-06-05 07:02:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71060 to 45512. [2021-06-05 07:02:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45512 states, 45511 states have (on average 3.869196457999165) internal successors, (176091), 45511 states have internal predecessors, (176091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:27,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45512 states to 45512 states and 176091 transitions. [2021-06-05 07:02:27,102 INFO L78 Accepts]: Start accepts. Automaton has 45512 states and 176091 transitions. Word has length 28 [2021-06-05 07:02:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:27,102 INFO L482 AbstractCegarLoop]: Abstraction has 45512 states and 176091 transitions. [2021-06-05 07:02:27,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 45512 states and 176091 transitions. [2021-06-05 07:02:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:27,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:27,176 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:27,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3623 [2021-06-05 07:02:27,376 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1155272981, now seen corresponding path program 160 times [2021-06-05 07:02:27,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:27,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006001754] [2021-06-05 07:02:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:27,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:27,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006001754] [2021-06-05 07:02:27,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006001754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:27,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122295441] [2021-06-05 07:02:27,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:27,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:27,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:27,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:27,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:27,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122295441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:27,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:27,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:27,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998350843] [2021-06-05 07:02:27,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:27,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:27,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:27,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:27,550 INFO L87 Difference]: Start difference. First operand 45512 states and 176091 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:28,774 INFO L93 Difference]: Finished difference Result 65145 states and 245703 transitions. [2021-06-05 07:02:28,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:02:28,774 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:29,332 INFO L225 Difference]: With dead ends: 65145 [2021-06-05 07:02:29,332 INFO L226 Difference]: Without dead ends: 65145 [2021-06-05 07:02:29,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 582.9ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:02:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65145 states. [2021-06-05 07:02:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65145 to 45542. [2021-06-05 07:02:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45542 states, 45541 states have (on average 3.868997167387629) internal successors, (176198), 45541 states have internal predecessors, (176198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45542 states to 45542 states and 176198 transitions. [2021-06-05 07:02:30,838 INFO L78 Accepts]: Start accepts. Automaton has 45542 states and 176198 transitions. Word has length 28 [2021-06-05 07:02:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:30,839 INFO L482 AbstractCegarLoop]: Abstraction has 45542 states and 176198 transitions. [2021-06-05 07:02:30,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 45542 states and 176198 transitions. [2021-06-05 07:02:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:30,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:30,910 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:31,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3624,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:31,110 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2039891173, now seen corresponding path program 161 times [2021-06-05 07:02:31,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:31,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620109394] [2021-06-05 07:02:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:31,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:31,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620109394] [2021-06-05 07:02:31,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620109394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:31,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071145498] [2021-06-05 07:02:31,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:31,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:02:31,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:31,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:31,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:31,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071145498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:31,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:31,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:02:31,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992050222] [2021-06-05 07:02:31,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:31,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:31,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:31,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:31,321 INFO L87 Difference]: Start difference. First operand 45542 states and 176198 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:33,327 INFO L93 Difference]: Finished difference Result 66003 states and 248139 transitions. [2021-06-05 07:02:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:02:33,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:33,543 INFO L225 Difference]: With dead ends: 66003 [2021-06-05 07:02:33,543 INFO L226 Difference]: Without dead ends: 66003 [2021-06-05 07:02:33,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 979.1ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:02:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66003 states. [2021-06-05 07:02:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66003 to 45806. [2021-06-05 07:02:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45806 states, 45805 states have (on average 3.8654295382600155) internal successors, (177056), 45805 states have internal predecessors, (177056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45806 states to 45806 states and 177056 transitions. [2021-06-05 07:02:35,040 INFO L78 Accepts]: Start accepts. Automaton has 45806 states and 177056 transitions. Word has length 28 [2021-06-05 07:02:35,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:35,040 INFO L482 AbstractCegarLoop]: Abstraction has 45806 states and 177056 transitions. [2021-06-05 07:02:35,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 45806 states and 177056 transitions. [2021-06-05 07:02:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:35,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:35,115 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:35,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3625,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:35,315 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:35,316 INFO L82 PathProgramCache]: Analyzing trace with hash 984513779, now seen corresponding path program 162 times [2021-06-05 07:02:35,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:35,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682766474] [2021-06-05 07:02:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:35,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:35,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682766474] [2021-06-05 07:02:35,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682766474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:35,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606631441] [2021-06-05 07:02:35,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:35,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:02:35,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:35,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:35,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:35,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606631441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:35,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:35,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:02:35,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273776818] [2021-06-05 07:02:35,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:35,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:35,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:35,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:35,487 INFO L87 Difference]: Start difference. First operand 45806 states and 177056 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:37,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:37,242 INFO L93 Difference]: Finished difference Result 65215 states and 245904 transitions. [2021-06-05 07:02:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:02:37,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:37,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:37,429 INFO L225 Difference]: With dead ends: 65215 [2021-06-05 07:02:37,429 INFO L226 Difference]: Without dead ends: 65211 [2021-06-05 07:02:37,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 770.3ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 07:02:37,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65211 states. [2021-06-05 07:02:38,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65211 to 45442. [2021-06-05 07:02:38,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45442 states, 45441 states have (on average 3.869193019519817) internal successors, (175820), 45441 states have internal predecessors, (175820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:38,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45442 states to 45442 states and 175820 transitions. [2021-06-05 07:02:38,909 INFO L78 Accepts]: Start accepts. Automaton has 45442 states and 175820 transitions. Word has length 28 [2021-06-05 07:02:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:38,909 INFO L482 AbstractCegarLoop]: Abstraction has 45442 states and 175820 transitions. [2021-06-05 07:02:38,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 45442 states and 175820 transitions. [2021-06-05 07:02:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:38,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:38,984 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:39,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3626 [2021-06-05 07:02:39,184 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash 452743569, now seen corresponding path program 163 times [2021-06-05 07:02:39,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:39,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882845260] [2021-06-05 07:02:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:39,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:39,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882845260] [2021-06-05 07:02:39,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882845260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:39,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025642012] [2021-06-05 07:02:39,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:39,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:39,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:39,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025642012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:39,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:39,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:39,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037609868] [2021-06-05 07:02:39,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:39,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:39,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:39,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:39,352 INFO L87 Difference]: Start difference. First operand 45442 states and 175820 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:40,673 INFO L93 Difference]: Finished difference Result 59545 states and 226305 transitions. [2021-06-05 07:02:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:02:40,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:40,838 INFO L225 Difference]: With dead ends: 59545 [2021-06-05 07:02:40,839 INFO L226 Difference]: Without dead ends: 59545 [2021-06-05 07:02:40,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 498.5ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:02:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2021-06-05 07:02:41,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 45458. [2021-06-05 07:02:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45458 states, 45457 states have (on average 3.8710869613040897) internal successors, (175968), 45457 states have internal predecessors, (175968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45458 states to 45458 states and 175968 transitions. [2021-06-05 07:02:42,168 INFO L78 Accepts]: Start accepts. Automaton has 45458 states and 175968 transitions. Word has length 28 [2021-06-05 07:02:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:42,168 INFO L482 AbstractCegarLoop]: Abstraction has 45458 states and 175968 transitions. [2021-06-05 07:02:42,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:42,168 INFO L276 IsEmpty]: Start isEmpty. Operand 45458 states and 175968 transitions. [2021-06-05 07:02:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:42,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:42,238 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:42,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3627,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:42,438 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:42,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:42,439 INFO L82 PathProgramCache]: Analyzing trace with hash 75176401, now seen corresponding path program 164 times [2021-06-05 07:02:42,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:42,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671979901] [2021-06-05 07:02:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:42,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:42,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671979901] [2021-06-05 07:02:42,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671979901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:42,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151531479] [2021-06-05 07:02:42,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:42,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:42,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:42,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151531479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:42,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:42,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:42,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444151552] [2021-06-05 07:02:42,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:42,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:42,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:42,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:42,597 INFO L87 Difference]: Start difference. First operand 45458 states and 175968 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:43,382 INFO L93 Difference]: Finished difference Result 58859 states and 224430 transitions. [2021-06-05 07:02:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:02:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:43,550 INFO L225 Difference]: With dead ends: 58859 [2021-06-05 07:02:43,550 INFO L226 Difference]: Without dead ends: 58847 [2021-06-05 07:02:43,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:02:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58847 states. [2021-06-05 07:02:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58847 to 45392. [2021-06-05 07:02:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45392 states, 45391 states have (on average 3.8722433962679825) internal successors, (175765), 45391 states have internal predecessors, (175765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45392 states to 45392 states and 175765 transitions. [2021-06-05 07:02:45,365 INFO L78 Accepts]: Start accepts. Automaton has 45392 states and 175765 transitions. Word has length 28 [2021-06-05 07:02:45,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:45,365 INFO L482 AbstractCegarLoop]: Abstraction has 45392 states and 175765 transitions. [2021-06-05 07:02:45,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:45,365 INFO L276 IsEmpty]: Start isEmpty. Operand 45392 states and 175765 transitions. [2021-06-05 07:02:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:45,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:45,442 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:45,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3628 [2021-06-05 07:02:45,643 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:45,643 INFO L82 PathProgramCache]: Analyzing trace with hash -681682287, now seen corresponding path program 165 times [2021-06-05 07:02:45,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:45,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014411952] [2021-06-05 07:02:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:45,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:45,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014411952] [2021-06-05 07:02:45,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014411952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:45,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955775835] [2021-06-05 07:02:45,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:45,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:02:45,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:45,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:45,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955775835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:45,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:45,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:45,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192223989] [2021-06-05 07:02:45,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:45,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:45,843 INFO L87 Difference]: Start difference. First operand 45392 states and 175765 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:46,573 INFO L93 Difference]: Finished difference Result 49879 states and 190563 transitions. [2021-06-05 07:02:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:02:46,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:46,723 INFO L225 Difference]: With dead ends: 49879 [2021-06-05 07:02:46,724 INFO L226 Difference]: Without dead ends: 49879 [2021-06-05 07:02:46,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:02:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49879 states. [2021-06-05 07:02:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49879 to 45600. [2021-06-05 07:02:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45600 states, 45599 states have (on average 3.8697559156999057) internal successors, (176457), 45599 states have internal predecessors, (176457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45600 states to 45600 states and 176457 transitions. [2021-06-05 07:02:48,001 INFO L78 Accepts]: Start accepts. Automaton has 45600 states and 176457 transitions. Word has length 28 [2021-06-05 07:02:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:48,001 INFO L482 AbstractCegarLoop]: Abstraction has 45600 states and 176457 transitions. [2021-06-05 07:02:48,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 45600 states and 176457 transitions. [2021-06-05 07:02:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:48,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:48,074 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:48,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3629,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:48,274 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash -852441489, now seen corresponding path program 166 times [2021-06-05 07:02:48,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:48,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525992477] [2021-06-05 07:02:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:48,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:48,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525992477] [2021-06-05 07:02:48,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525992477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:48,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463280170] [2021-06-05 07:02:48,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:48,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:48,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:48,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:48,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463280170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:48,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:48,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:02:48,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652041583] [2021-06-05 07:02:48,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:02:48,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:48,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:02:48,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:02:48,423 INFO L87 Difference]: Start difference. First operand 45600 states and 176457 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:49,323 INFO L93 Difference]: Finished difference Result 49726 states and 190165 transitions. [2021-06-05 07:02:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:49,468 INFO L225 Difference]: With dead ends: 49726 [2021-06-05 07:02:49,468 INFO L226 Difference]: Without dead ends: 49722 [2021-06-05 07:02:49,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:49,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49722 states. [2021-06-05 07:02:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49722 to 45540. [2021-06-05 07:02:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45540 states, 45539 states have (on average 3.8706383539383826) internal successors, (176265), 45539 states have internal predecessors, (176265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45540 states to 45540 states and 176265 transitions. [2021-06-05 07:02:50,738 INFO L78 Accepts]: Start accepts. Automaton has 45540 states and 176265 transitions. Word has length 28 [2021-06-05 07:02:50,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:50,738 INFO L482 AbstractCegarLoop]: Abstraction has 45540 states and 176265 transitions. [2021-06-05 07:02:50,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand 45540 states and 176265 transitions. [2021-06-05 07:02:50,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:50,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:50,811 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:51,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3630,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:51,012 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash -492872947, now seen corresponding path program 81 times [2021-06-05 07:02:51,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:51,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264172722] [2021-06-05 07:02:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:51,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:51,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264172722] [2021-06-05 07:02:51,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264172722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:51,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859586831] [2021-06-05 07:02:51,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:51,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:02:51,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:51,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:51,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:51,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859586831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:51,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:51,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:02:51,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936190165] [2021-06-05 07:02:51,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:02:51,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:51,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:02:51,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:02:51,133 INFO L87 Difference]: Start difference. First operand 45540 states and 176265 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:51,722 INFO L93 Difference]: Finished difference Result 49767 states and 190248 transitions. [2021-06-05 07:02:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:02:51,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:51,857 INFO L225 Difference]: With dead ends: 49767 [2021-06-05 07:02:51,857 INFO L226 Difference]: Without dead ends: 49767 [2021-06-05 07:02:51,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49767 states. [2021-06-05 07:02:53,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49767 to 45644. [2021-06-05 07:02:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45644 states, 45643 states have (on average 3.8689174681769383) internal successors, (176589), 45643 states have internal predecessors, (176589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45644 states to 45644 states and 176589 transitions. [2021-06-05 07:02:53,433 INFO L78 Accepts]: Start accepts. Automaton has 45644 states and 176589 transitions. Word has length 28 [2021-06-05 07:02:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:53,433 INFO L482 AbstractCegarLoop]: Abstraction has 45644 states and 176589 transitions. [2021-06-05 07:02:53,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 45644 states and 176589 transitions. [2021-06-05 07:02:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:53,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:53,508 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:53,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3631,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:53,709 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:53,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1753160091, now seen corresponding path program 82 times [2021-06-05 07:02:53,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:53,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449866897] [2021-06-05 07:02:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:53,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:53,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449866897] [2021-06-05 07:02:53,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449866897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:53,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394436568] [2021-06-05 07:02:53,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:53,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:53,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:53,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:53,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394436568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:53,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:53,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 07:02:53,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233310939] [2021-06-05 07:02:53,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:53,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:53,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:53,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:53,877 INFO L87 Difference]: Start difference. First operand 45644 states and 176589 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:54,807 INFO L93 Difference]: Finished difference Result 56748 states and 216058 transitions. [2021-06-05 07:02:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:02:54,808 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:54,969 INFO L225 Difference]: With dead ends: 56748 [2021-06-05 07:02:54,969 INFO L226 Difference]: Without dead ends: 56658 [2021-06-05 07:02:54,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 583.2ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:02:55,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56658 states. [2021-06-05 07:02:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56658 to 45467. [2021-06-05 07:02:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45467 states, 45466 states have (on average 3.8675713720142526) internal successors, (175843), 45466 states have internal predecessors, (175843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45467 states to 45467 states and 175843 transitions. [2021-06-05 07:02:56,301 INFO L78 Accepts]: Start accepts. Automaton has 45467 states and 175843 transitions. Word has length 28 [2021-06-05 07:02:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:56,301 INFO L482 AbstractCegarLoop]: Abstraction has 45467 states and 175843 transitions. [2021-06-05 07:02:56,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:56,302 INFO L276 IsEmpty]: Start isEmpty. Operand 45467 states and 175843 transitions. [2021-06-05 07:02:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:56,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:56,377 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:56,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:56,581 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:56,581 INFO L82 PathProgramCache]: Analyzing trace with hash -115621907, now seen corresponding path program 83 times [2021-06-05 07:02:56,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:56,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656545705] [2021-06-05 07:02:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:56,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:56,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656545705] [2021-06-05 07:02:56,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656545705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:56,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097230766] [2021-06-05 07:02:56,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:56,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:02:56,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:56,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:56,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097230766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:56,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:56,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 07:02:56,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800475417] [2021-06-05 07:02:56,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:02:56,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:56,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:02:56,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:02:56,689 INFO L87 Difference]: Start difference. First operand 45467 states and 175843 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:57,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:57,143 INFO L93 Difference]: Finished difference Result 49946 states and 190806 transitions. [2021-06-05 07:02:57,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:02:57,144 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:57,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:57,286 INFO L225 Difference]: With dead ends: 49946 [2021-06-05 07:02:57,286 INFO L226 Difference]: Without dead ends: 49934 [2021-06-05 07:02:57,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:02:57,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49934 states. [2021-06-05 07:02:58,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49934 to 45605. [2021-06-05 07:02:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45605 states, 45604 states have (on average 3.865713533900535) internal successors, (176292), 45604 states have internal predecessors, (176292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45605 states to 45605 states and 176292 transitions. [2021-06-05 07:02:58,968 INFO L78 Accepts]: Start accepts. Automaton has 45605 states and 176292 transitions. Word has length 28 [2021-06-05 07:02:58,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:58,969 INFO L482 AbstractCegarLoop]: Abstraction has 45605 states and 176292 transitions. [2021-06-05 07:02:58,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 45605 states and 176292 transitions. [2021-06-05 07:02:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:59,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:59,054 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:59,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3633 [2021-06-05 07:02:59,254 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:59,255 INFO L82 PathProgramCache]: Analyzing trace with hash -903981331, now seen corresponding path program 84 times [2021-06-05 07:02:59,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:59,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612506846] [2021-06-05 07:02:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:59,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:59,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612506846] [2021-06-05 07:02:59,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612506846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:59,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882852673] [2021-06-05 07:02:59,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:59,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:02:59,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:59,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:59,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:59,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882852673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:59,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:59,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:02:59,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980655648] [2021-06-05 07:02:59,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:02:59,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:59,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:02:59,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:02:59,371 INFO L87 Difference]: Start difference. First operand 45605 states and 176292 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:59,880 INFO L93 Difference]: Finished difference Result 49910 states and 190722 transitions. [2021-06-05 07:02:59,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:02:59,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:00,007 INFO L225 Difference]: With dead ends: 49910 [2021-06-05 07:03:00,007 INFO L226 Difference]: Without dead ends: 49890 [2021-06-05 07:03:00,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:03:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49890 states. [2021-06-05 07:03:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49890 to 45605. [2021-06-05 07:03:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45605 states, 45604 states have (on average 3.86562582229629) internal successors, (176288), 45604 states have internal predecessors, (176288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45605 states to 45605 states and 176288 transitions. [2021-06-05 07:03:01,219 INFO L78 Accepts]: Start accepts. Automaton has 45605 states and 176288 transitions. Word has length 28 [2021-06-05 07:03:01,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:01,219 INFO L482 AbstractCegarLoop]: Abstraction has 45605 states and 176288 transitions. [2021-06-05 07:03:01,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 45605 states and 176288 transitions. [2021-06-05 07:03:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:03:01,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:01,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:01,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3634,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:01,491 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash 987543313, now seen corresponding path program 167 times [2021-06-05 07:03:01,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:01,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114303090] [2021-06-05 07:03:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:01,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:01,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114303090] [2021-06-05 07:03:01,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114303090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:01,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020422457] [2021-06-05 07:03:01,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:01,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:03:01,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:01,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:03:01,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:01,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020422457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:01,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:01,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:03:01,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119496491] [2021-06-05 07:03:01,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:01,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:01,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:01,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:01,620 INFO L87 Difference]: Start difference. First operand 45605 states and 176288 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:02,064 INFO L93 Difference]: Finished difference Result 50572 states and 193874 transitions. [2021-06-05 07:03:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:03:02,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:03:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:02,518 INFO L225 Difference]: With dead ends: 50572 [2021-06-05 07:03:02,518 INFO L226 Difference]: Without dead ends: 50559 [2021-06-05 07:03:02,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:03:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50559 states. [2021-06-05 07:03:03,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50559 to 48338. [2021-06-05 07:03:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48338 states, 48337 states have (on average 3.8743819434387734) internal successors, (187276), 48337 states have internal predecessors, (187276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48338 states to 48338 states and 187276 transitions. [2021-06-05 07:03:03,889 INFO L78 Accepts]: Start accepts. Automaton has 48338 states and 187276 transitions. Word has length 28 [2021-06-05 07:03:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:03,889 INFO L482 AbstractCegarLoop]: Abstraction has 48338 states and 187276 transitions. [2021-06-05 07:03:03,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 48338 states and 187276 transitions. [2021-06-05 07:03:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:03:03,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:03,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:04,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3635 [2021-06-05 07:03:04,171 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:04,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:04,171 INFO L82 PathProgramCache]: Analyzing trace with hash 304798983, now seen corresponding path program 168 times [2021-06-05 07:03:04,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:04,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038366472] [2021-06-05 07:03:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:04,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:04,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038366472] [2021-06-05 07:03:04,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038366472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:04,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161629754] [2021-06-05 07:03:04,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:04,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:03:04,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:04,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:03:04,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:04,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161629754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:04,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:04,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:03:04,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295286573] [2021-06-05 07:03:04,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:04,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:04,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:04,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:04,302 INFO L87 Difference]: Start difference. First operand 48338 states and 187276 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:04,820 INFO L93 Difference]: Finished difference Result 53920 states and 205320 transitions. [2021-06-05 07:03:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:03:04,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:03:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:04,966 INFO L225 Difference]: With dead ends: 53920 [2021-06-05 07:03:04,966 INFO L226 Difference]: Without dead ends: 53920 [2021-06-05 07:03:04,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:03:05,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53920 states. [2021-06-05 07:03:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53920 to 42878. [2021-06-05 07:03:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 3.8613708981505237) internal successors, (165564), 42877 states have internal predecessors, (165564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 165564 transitions. [2021-06-05 07:03:06,239 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 165564 transitions. Word has length 28 [2021-06-05 07:03:06,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:06,239 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 165564 transitions. [2021-06-05 07:03:06,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:06,239 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 165564 transitions. [2021-06-05 07:03:06,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:03:06,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:06,314 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:06,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3636 [2021-06-05 07:03:06,514 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash -15319481, now seen corresponding path program 169 times [2021-06-05 07:03:06,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:06,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2513920] [2021-06-05 07:03:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:06,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:06,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2513920] [2021-06-05 07:03:06,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2513920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:06,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215621073] [2021-06-05 07:03:06,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:06,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:03:06,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:06,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215621073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:06,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:06,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:03:06,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990707876] [2021-06-05 07:03:06,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:06,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:06,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:06,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:06,643 INFO L87 Difference]: Start difference. First operand 42878 states and 165564 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:07,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:07,507 INFO L93 Difference]: Finished difference Result 47758 states and 181995 transitions. [2021-06-05 07:03:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:03:07,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:03:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:07,620 INFO L225 Difference]: With dead ends: 47758 [2021-06-05 07:03:07,620 INFO L226 Difference]: Without dead ends: 47758 [2021-06-05 07:03:07,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:03:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47758 states. [2021-06-05 07:03:08,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47758 to 43711. [2021-06-05 07:03:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43711 states, 43710 states have (on average 3.8600320292839165) internal successors, (168722), 43710 states have internal predecessors, (168722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43711 states to 43711 states and 168722 transitions. [2021-06-05 07:03:08,865 INFO L78 Accepts]: Start accepts. Automaton has 43711 states and 168722 transitions. Word has length 28 [2021-06-05 07:03:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:08,865 INFO L482 AbstractCegarLoop]: Abstraction has 43711 states and 168722 transitions. [2021-06-05 07:03:08,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:08,865 INFO L276 IsEmpty]: Start isEmpty. Operand 43711 states and 168722 transitions. [2021-06-05 07:03:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:03:08,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:08,941 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:09,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3637,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:09,145 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:09,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1024489657, now seen corresponding path program 170 times [2021-06-05 07:03:09,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:09,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45732480] [2021-06-05 07:03:09,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:09,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:09,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45732480] [2021-06-05 07:03:09,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45732480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:09,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762806692] [2021-06-05 07:03:09,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:09,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:09,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:09,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:03:09,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:09,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762806692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:09,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:09,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:03:09,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866672089] [2021-06-05 07:03:09,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:09,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:09,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:09,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:09,282 INFO L87 Difference]: Start difference. First operand 43711 states and 168722 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:09,754 INFO L93 Difference]: Finished difference Result 45468 states and 174583 transitions. [2021-06-05 07:03:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:03:09,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:03:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:09,871 INFO L225 Difference]: With dead ends: 45468 [2021-06-05 07:03:09,871 INFO L226 Difference]: Without dead ends: 45468 [2021-06-05 07:03:09,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:03:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45468 states. [2021-06-05 07:03:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45468 to 43719. [2021-06-05 07:03:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43719 states, 43718 states have (on average 3.85987465117343) internal successors, (168746), 43718 states have internal predecessors, (168746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43719 states to 43719 states and 168746 transitions. [2021-06-05 07:03:10,976 INFO L78 Accepts]: Start accepts. Automaton has 43719 states and 168746 transitions. Word has length 28 [2021-06-05 07:03:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:10,976 INFO L482 AbstractCegarLoop]: Abstraction has 43719 states and 168746 transitions. [2021-06-05 07:03:10,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 43719 states and 168746 transitions. [2021-06-05 07:03:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:03:11,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:11,044 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:11,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3638 [2021-06-05 07:03:11,245 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:11,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:11,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1121758121, now seen corresponding path program 171 times [2021-06-05 07:03:11,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:11,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158433538] [2021-06-05 07:03:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:11,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:11,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158433538] [2021-06-05 07:03:11,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158433538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:11,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18281427] [2021-06-05 07:03:11,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:11,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:03:11,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:03:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:11,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18281427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:11,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:11,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:03:11,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867824907] [2021-06-05 07:03:11,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:03:11,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:11,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:03:11,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:03:11,388 INFO L87 Difference]: Start difference. First operand 43719 states and 168746 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:11,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:11,831 INFO L93 Difference]: Finished difference Result 45188 states and 173661 transitions. [2021-06-05 07:03:11,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:03:11,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:03:11,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:11,943 INFO L225 Difference]: With dead ends: 45188 [2021-06-05 07:03:11,943 INFO L226 Difference]: Without dead ends: 45188 [2021-06-05 07:03:11,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:03:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45188 states. [2021-06-05 07:03:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45188 to 43613. [2021-06-05 07:03:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43613 states, 43612 states have (on average 3.859534073190865) internal successors, (168322), 43612 states have internal predecessors, (168322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43613 states to 43613 states and 168322 transitions. [2021-06-05 07:03:13,092 INFO L78 Accepts]: Start accepts. Automaton has 43613 states and 168322 transitions. Word has length 28 [2021-06-05 07:03:13,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:13,092 INFO L482 AbstractCegarLoop]: Abstraction has 43613 states and 168322 transitions. [2021-06-05 07:03:13,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:13,092 INFO L276 IsEmpty]: Start isEmpty. Operand 43613 states and 168322 transitions. [2021-06-05 07:03:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:13,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:13,165 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:13,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3639,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:13,366 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1358211129, now seen corresponding path program 172 times [2021-06-05 07:03:13,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:13,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088794819] [2021-06-05 07:03:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:13,743 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-06-05 07:03:14,195 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-06-05 07:03:14,340 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 07:03:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:14,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:14,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088794819] [2021-06-05 07:03:14,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088794819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:14,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335293401] [2021-06-05 07:03:14,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:14,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:14,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:14,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:03:14,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:15,050 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 07:03:15,293 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 07:03:15,861 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 103 [2021-06-05 07:03:16,106 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 07:03:16,456 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 07:03:16,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:16,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:16,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:16,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:16,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 07:03:16,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:16,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:16,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:16,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:16,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 07:03:16,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:17,337 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 147 [2021-06-05 07:03:17,338 INFO L628 ElimStorePlain]: treesize reduction 364, result has 54.9 percent of original size [2021-06-05 07:03:17,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:17,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:17,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:17,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:17,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2021-06-05 07:03:17,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:17,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:17,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:17,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:17,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 07:03:17,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:17,536 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-06-05 07:03:17,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:17,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:17,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:17,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 07:03:17,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:17,706 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 07:03:17,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:17,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:17,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:17,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:17,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 07:03:17,718 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:17,870 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 07:03:17,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:17,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:17,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:17,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:17,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 07:03:17,881 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:18,026 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 07:03:18,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:18,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:18,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:18,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 07:03:18,036 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:18,177 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 07:03:18,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:18,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 07:03:18,186 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:18,320 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 07:03:18,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:18,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:18,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:18,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:18,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 07:03:18,329 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:18,468 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 07:03:18,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:18,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 07:03:18,474 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:867, output treesize:87 [2021-06-05 07:03:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:18,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335293401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:18,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:18,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:03:18,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863847837] [2021-06-05 07:03:18,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:03:18,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:18,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:03:18,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:03:18,558 INFO L87 Difference]: Start difference. First operand 43613 states and 168322 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:18,774 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2021-06-05 07:03:19,032 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2021-06-05 07:03:19,594 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 117 [2021-06-05 07:03:19,923 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2021-06-05 07:03:20,447 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-06-05 07:03:21,210 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2021-06-05 07:03:21,943 WARN L205 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 127 [2021-06-05 07:03:23,178 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 163 DAG size of output: 146 [2021-06-05 07:03:23,420 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 07:03:23,653 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 07:03:24,119 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 108 [2021-06-05 07:03:24,642 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 131 [2021-06-05 07:03:25,133 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 128 [2021-06-05 07:03:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:25,641 INFO L93 Difference]: Finished difference Result 46436 states and 176472 transitions. [2021-06-05 07:03:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:03:25,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 07:03:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:25,752 INFO L225 Difference]: With dead ends: 46436 [2021-06-05 07:03:25,752 INFO L226 Difference]: Without dead ends: 46376 [2021-06-05 07:03:25,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 8477.6ms TimeCoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:03:25,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46376 states. [2021-06-05 07:03:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46376 to 43670. [2021-06-05 07:03:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43670 states, 43669 states have (on average 3.858686940392498) internal successors, (168505), 43669 states have internal predecessors, (168505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43670 states to 43670 states and 168505 transitions. [2021-06-05 07:03:26,835 INFO L78 Accepts]: Start accepts. Automaton has 43670 states and 168505 transitions. Word has length 30 [2021-06-05 07:03:26,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:26,835 INFO L482 AbstractCegarLoop]: Abstraction has 43670 states and 168505 transitions. [2021-06-05 07:03:26,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 43670 states and 168505 transitions. [2021-06-05 07:03:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:26,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:26,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:27,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3640,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:27,116 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash 908358151, now seen corresponding path program 173 times [2021-06-05 07:03:27,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:27,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808241526] [2021-06-05 07:03:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:27,476 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2021-06-05 07:03:27,688 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-06-05 07:03:27,874 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-06-05 07:03:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:28,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808241526] [2021-06-05 07:03:28,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808241526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221358079] [2021-06-05 07:03:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:28,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:03:28,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:28,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:03:28,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:28,597 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 07:03:29,081 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 07:03:29,448 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 07:03:29,710 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 07:03:30,593 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 124 Received shutdown request... [2021-06-05 07:03:30,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3681 [2021-06-05 07:03:30,819 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 07:03:30,820 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:03:30,822 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 07:03:30,822 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:03:30 BasicIcfg [2021-06-05 07:03:30,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:03:30,823 INFO L168 Benchmark]: Toolchain (without parser) took 759047.79 ms. Allocated memory was 339.7 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 319.1 MB in the beginning and 12.8 GB in the end (delta: -12.5 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. [2021-06-05 07:03:30,823 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 339.7 MB. Free memory was 320.3 MB in the beginning and 320.3 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:03:30,823 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.79 ms. Allocated memory is still 339.7 MB. Free memory was 319.1 MB in the beginning and 317.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:03:30,823 INFO L168 Benchmark]: Boogie Preprocessor took 25.18 ms. Allocated memory is still 339.7 MB. Free memory was 317.6 MB in the beginning and 316.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:03:30,823 INFO L168 Benchmark]: RCFGBuilder took 276.70 ms. Allocated memory is still 339.7 MB. Free memory was 316.5 MB in the beginning and 302.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 07:03:30,823 INFO L168 Benchmark]: TraceAbstraction took 758713.63 ms. Allocated memory was 339.7 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 302.4 MB in the beginning and 12.8 GB in the end (delta: -12.5 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. [2021-06-05 07:03:30,823 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 339.7 MB. Free memory was 320.3 MB in the beginning and 320.3 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.79 ms. Allocated memory is still 339.7 MB. Free memory was 319.1 MB in the beginning and 317.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 25.18 ms. Allocated memory is still 339.7 MB. Free memory was 317.6 MB in the beginning and 316.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 276.70 ms. Allocated memory is still 339.7 MB. Free memory was 316.5 MB in the beginning and 302.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 758713.63 ms. Allocated memory was 339.7 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 302.4 MB in the beginning and 12.8 GB in the end (delta: -12.5 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 758553.0ms, OverallIterations: 259, TraceHistogramMax: 3, EmptinessCheckTime: 5166.5ms, AutomataDifference: 381236.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11345 SDtfs, 71140 SDslu, 86875 SDs, 0 SdLazy, 140155 SolverSat, 12960 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84310.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16461 GetRequests, 5459 SyntacticMatches, 245 SemanticMatches, 10757 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179384 ImplicationChecksByTransitivity, 339559.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48338occurred in iteration=253, InterpolantAutomatonStates: 9551, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 86586.0ms AutomataMinimizationTime, 258 MinimizatonAttempts, 1250247 StatesRemovedByMinimization, 257 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 911.1ms SsaConstructionTime, 3358.5ms SatisfiabilityAnalysisTime, 219853.7ms InterpolantComputationTime, 13718 NumberOfCodeBlocks, 13718 NumberOfCodeBlocksAsserted, 893 NumberOfCheckSat, 13204 ConstructedInterpolants, 149 QuantifiedInterpolants, 273614 SizeOfPredicates, 1244 NumberOfNonLiveVariables, 19062 ConjunctsInSsa, 4267 ConjunctsInUnsatCore, 514 InterpolantComputations, 2 PerfectInterpolantSequences, 1020/4341 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown