/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:06:03,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:06:03,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:06:03,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:06:03,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 16:06:03,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 16:06:03,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 16:06:03,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 16:06:03,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 16:06:03,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 16:06:03,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 16:06:03,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 16:06:03,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 16:06:03,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 16:06:03,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 16:06:03,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 16:06:03,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 16:06:03,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:06:03,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:06:03,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:06:03,368 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-Separate.epf [2021-06-05 16:06:03,403 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:06:03,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:06:03,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:06:03,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:06:03,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:06:03,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:06:03,406 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:06:03,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:06:03,407 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:06:03,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:06:03,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:06:03,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:06:03,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:06:03,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:06:03,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:06:03,409 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:06:03,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:06:03,409 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:06:03,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:06:03,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:06:03,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:06:03,410 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:06:03,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:06:03,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:06:03,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:06:03,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:06:03,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:06:03,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:06:03,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:06:03,411 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:06:03,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:06:03,411 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:06:03,412 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:06:03,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:06:03,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:06:03,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:06:03,734 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:06:03,736 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:06:03,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl [2021-06-05 16:06:03,737 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl' [2021-06-05 16:06:03,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:06:03,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:06:03,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:06:03,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:06:03,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:06:03,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:03" (1/1) ... [2021-06-05 16:06:03,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:03" (1/1) ... [2021-06-05 16:06:03,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:06:03,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:06:03,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:06:03,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:06:03,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:03" (1/1) ... [2021-06-05 16:06:03,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:03" (1/1) ... [2021-06-05 16:06:03,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:03" (1/1) ... [2021-06-05 16:06:03,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:03" (1/1) ... [2021-06-05 16:06:03,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:03" (1/1) ... [2021-06-05 16:06:03,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:03" (1/1) ... [2021-06-05 16:06:03,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:03" (1/1) ... [2021-06-05 16:06:03,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:06:03,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:06:03,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:06:03,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:06:03,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:03" (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 16:06:04,023 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:06:04,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:06:04,024 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:06:04,024 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:06:04,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:06:04,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:06:04,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:06:04,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:06:04,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:06:04,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:06:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:06:04,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:06:04,028 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 16:06:04,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:06:04,301 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:06:04,302 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:06:04 BoogieIcfgContainer [2021-06-05 16:06:04,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:06:04,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:06:04,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:06:04,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:06:04,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:03" (1/2) ... [2021-06-05 16:06:04,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7d3caf and model type ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:06:04, skipping insertion in model container [2021-06-05 16:06:04,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:06:04" (2/2) ... [2021-06-05 16:06:04,309 INFO L111 eAbstractionObserver]: Analyzing ICFG ring-nondet.wvr.bpl [2021-06-05 16:06:04,313 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:06:04,313 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:06:04,314 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:06:04,314 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:06:04,344 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:06:04,361 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:06:04,376 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:06:04,377 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:06:04,377 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:06:04,377 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:06:04,377 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:06:04,377 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:06:04,377 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:06:04,377 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:06:04,385 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-06-05 16:06:04,462 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 348 states, 346 states have (on average 2.9421965317919074) internal successors, (1018), 347 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 346 states have (on average 2.9421965317919074) internal successors, (1018), 347 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:04,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 16:06:04,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:04,483 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:04,484 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:04,489 INFO L82 PathProgramCache]: Analyzing trace with hash -766477116, now seen corresponding path program 1 times [2021-06-05 16:06:04,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:04,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960938501] [2021-06-05 16:06:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:04,646 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 16:06:04,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:04,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960938501] [2021-06-05 16:06:04,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960938501] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:06:04,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:06:04,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 16:06:04,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716734928] [2021-06-05 16:06:04,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:06:04,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:06:04,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:04,677 INFO L87 Difference]: Start difference. First operand has 348 states, 346 states have (on average 2.9421965317919074) internal successors, (1018), 347 states have internal predecessors, (1018), 0 states have call successors, (0), 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 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:04,728 INFO L93 Difference]: Finished difference Result 393 states and 1157 transitions. [2021-06-05 16:06:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:06:04,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 16:06:04,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:04,753 INFO L225 Difference]: With dead ends: 393 [2021-06-05 16:06:04,753 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 16:06:04,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 16:06:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2021-06-05 16:06:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.951530612244898) internal successors, (1157), 392 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1157 transitions. [2021-06-05 16:06:04,845 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1157 transitions. Word has length 16 [2021-06-05 16:06:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:04,846 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1157 transitions. [2021-06-05 16:06:04,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1157 transitions. [2021-06-05 16:06:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:06:04,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:04,849 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] [2021-06-05 16:06:04,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:06:04,850 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:04,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1760185073, now seen corresponding path program 1 times [2021-06-05 16:06:04,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:04,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366077464] [2021-06-05 16:06:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:04,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:04,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366077464] [2021-06-05 16:06:04,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366077464] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:06:04,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:06:04,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 16:06:04,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748950072] [2021-06-05 16:06:04,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:06:04,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:04,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:06:04,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:04,908 INFO L87 Difference]: Start difference. First operand 393 states and 1157 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:04,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:04,939 INFO L93 Difference]: Finished difference Result 442 states and 1303 transitions. [2021-06-05 16:06:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:06:04,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:06:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:04,942 INFO L225 Difference]: With dead ends: 442 [2021-06-05 16:06:04,942 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 16:06:04,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 16:06:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-06-05 16:06:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.9546485260770976) internal successors, (1303), 441 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1303 transitions. [2021-06-05 16:06:04,964 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1303 transitions. Word has length 21 [2021-06-05 16:06:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:04,964 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1303 transitions. [2021-06-05 16:06:04,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1303 transitions. [2021-06-05 16:06:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:06:04,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:04,966 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, 1, 1] [2021-06-05 16:06:04,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:06:04,967 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:04,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:04,967 INFO L82 PathProgramCache]: Analyzing trace with hash 992917241, now seen corresponding path program 1 times [2021-06-05 16:06:04,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:04,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330360321] [2021-06-05 16:06:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:06:05,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:05,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330360321] [2021-06-05 16:06:05,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330360321] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:06:05,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:06:05,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 16:06:05,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135127845] [2021-06-05 16:06:05,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:06:05,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:05,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:06:05,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:05,030 INFO L87 Difference]: Start difference. First operand 442 states and 1303 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:05,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:05,049 INFO L93 Difference]: Finished difference Result 880 states and 2602 transitions. [2021-06-05 16:06:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:06:05,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 16:06:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:05,054 INFO L225 Difference]: With dead ends: 880 [2021-06-05 16:06:05,054 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 16:06:05,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 16:06:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 515. [2021-06-05 16:06:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.9591439688715955) internal successors, (1521), 514 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1521 transitions. [2021-06-05 16:06:05,074 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1521 transitions. Word has length 26 [2021-06-05 16:06:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:05,074 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1521 transitions. [2021-06-05 16:06:05,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1521 transitions. [2021-06-05 16:06:05,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:06:05,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:05,076 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, 1, 1, 1, 1] [2021-06-05 16:06:05,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:06:05,077 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:05,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:05,077 INFO L82 PathProgramCache]: Analyzing trace with hash -92913957, now seen corresponding path program 1 times [2021-06-05 16:06:05,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:05,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471609201] [2021-06-05 16:06:05,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:06:05,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:05,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471609201] [2021-06-05 16:06:05,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471609201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:05,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582088388] [2021-06-05 16:06:05,174 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 16:06:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:05,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:06:05,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:06:05,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582088388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:05,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:05,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-06-05 16:06:05,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646469854] [2021-06-05 16:06:05,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:06:05,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:05,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:06:05,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:06:05,455 INFO L87 Difference]: Start difference. First operand 515 states and 1521 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:05,636 INFO L93 Difference]: Finished difference Result 1639 states and 4869 transitions. [2021-06-05 16:06:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:06:05,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 16:06:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:05,642 INFO L225 Difference]: With dead ends: 1639 [2021-06-05 16:06:05,642 INFO L226 Difference]: Without dead ends: 1137 [2021-06-05 16:06:05,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:06:05,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-05 16:06:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 843. [2021-06-05 16:06:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.9631828978622328) internal successors, (2495), 842 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2495 transitions. [2021-06-05 16:06:05,668 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2495 transitions. Word has length 28 [2021-06-05 16:06:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:05,668 INFO L482 AbstractCegarLoop]: Abstraction has 843 states and 2495 transitions. [2021-06-05 16:06:05,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2495 transitions. [2021-06-05 16:06:05,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:06:05,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:05,670 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, 1, 1, 1, 1] [2021-06-05 16:06:05,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:05,895 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash -121778885, now seen corresponding path program 2 times [2021-06-05 16:06:05,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:05,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97837455] [2021-06-05 16:06:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:05,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:05,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97837455] [2021-06-05 16:06:05,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97837455] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:06:05,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:06:05,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 16:06:05,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894345062] [2021-06-05 16:06:05,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:06:05,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:05,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:06:05,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:05,941 INFO L87 Difference]: Start difference. First operand 843 states and 2495 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:05,950 INFO L93 Difference]: Finished difference Result 713 states and 2082 transitions. [2021-06-05 16:06:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:06:05,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 16:06:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:05,954 INFO L225 Difference]: With dead ends: 713 [2021-06-05 16:06:05,954 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 16:06:05,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:05,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 16:06:05,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-06-05 16:06:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.9241573033707864) internal successors, (2082), 712 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2082 transitions. [2021-06-05 16:06:05,971 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2082 transitions. Word has length 28 [2021-06-05 16:06:05,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:05,972 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2082 transitions. [2021-06-05 16:06:05,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:05,972 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2082 transitions. [2021-06-05 16:06:05,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 16:06:05,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:05,975 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:05,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 16:06:05,976 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:05,976 INFO L82 PathProgramCache]: Analyzing trace with hash -643643710, now seen corresponding path program 3 times [2021-06-05 16:06:05,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:05,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527327937] [2021-06-05 16:06:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:06:06,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:06,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527327937] [2021-06-05 16:06:06,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527327937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:06,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785900667] [2021-06-05 16:06:06,093 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 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 16:06:06,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:06:06,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:06,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:06:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 16:06:06,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785900667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:06,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:06,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-05 16:06:06,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455785785] [2021-06-05 16:06:06,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:06:06,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:06,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:06:06,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:06:06,389 INFO L87 Difference]: Start difference. First operand 713 states and 2082 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:07,263 INFO L93 Difference]: Finished difference Result 2300 states and 6794 transitions. [2021-06-05 16:06:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:06:07,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 16:06:07,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:07,277 INFO L225 Difference]: With dead ends: 2300 [2021-06-05 16:06:07,278 INFO L226 Difference]: Without dead ends: 1648 [2021-06-05 16:06:07,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 515.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:06:07,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-06-05 16:06:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1168. [2021-06-05 16:06:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.942587832047986) internal successors, (3434), 1167 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3434 transitions. [2021-06-05 16:06:07,309 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3434 transitions. Word has length 35 [2021-06-05 16:06:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:07,309 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3434 transitions. [2021-06-05 16:06:07,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3434 transitions. [2021-06-05 16:06:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:06:07,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:07,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:07,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:07,527 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:07,527 INFO L82 PathProgramCache]: Analyzing trace with hash 407150600, now seen corresponding path program 4 times [2021-06-05 16:06:07,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:07,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646362818] [2021-06-05 16:06:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 16:06:07,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:07,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646362818] [2021-06-05 16:06:07,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646362818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:07,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604825273] [2021-06-05 16:06:07,597 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 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 16:06:07,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:06:07,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:07,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:06:07,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:07,717 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 7 treesize of output 3 [2021-06-05 16:06:07,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:07,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:07,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:07,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 16:06:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 16:06:07,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604825273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:07,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:07,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 16:06:07,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330863853] [2021-06-05 16:06:07,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:06:07,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:06:07,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:06:07,787 INFO L87 Difference]: Start difference. First operand 1168 states and 3434 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 16:06:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:07,815 INFO L93 Difference]: Finished difference Result 2636 states and 7723 transitions. [2021-06-05 16:06:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:06:07,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 40 [2021-06-05 16:06:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:07,827 INFO L225 Difference]: With dead ends: 2636 [2021-06-05 16:06:07,827 INFO L226 Difference]: Without dead ends: 2595 [2021-06-05 16:06:07,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:06:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2021-06-05 16:06:07,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2203. [2021-06-05 16:06:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 3.022706630336058) internal successors, (6656), 2202 states have internal predecessors, (6656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6656 transitions. [2021-06-05 16:06:07,889 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6656 transitions. Word has length 40 [2021-06-05 16:06:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:07,889 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6656 transitions. [2021-06-05 16:06:07,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 16:06:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6656 transitions. [2021-06-05 16:06:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:06:07,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:07,894 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:08,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:08,109 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:08,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1457932716, now seen corresponding path program 5 times [2021-06-05 16:06:08,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:08,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921535299] [2021-06-05 16:06:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:06:08,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:08,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921535299] [2021-06-05 16:06:08,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921535299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:08,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66190099] [2021-06-05 16:06:08,171 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 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 16:06:08,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:06:08,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:08,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:06:08,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:08,366 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 7 treesize of output 3 [2021-06-05 16:06:08,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:08,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:08,399 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 16:06:08,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:06:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:06:08,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66190099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:08,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:08,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 16:06:08,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323036842] [2021-06-05 16:06:08,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:06:08,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:08,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:06:08,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:06:08,466 INFO L87 Difference]: Start difference. First operand 2203 states and 6656 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 16:06:08,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:08,757 INFO L93 Difference]: Finished difference Result 4689 states and 14236 transitions. [2021-06-05 16:06:08,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:06:08,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 40 [2021-06-05 16:06:08,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:08,773 INFO L225 Difference]: With dead ends: 4689 [2021-06-05 16:06:08,774 INFO L226 Difference]: Without dead ends: 2889 [2021-06-05 16:06:08,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:06:08,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-06-05 16:06:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2233. [2021-06-05 16:06:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.027329749103943) internal successors, (6757), 2232 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 6757 transitions. [2021-06-05 16:06:08,843 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 6757 transitions. Word has length 40 [2021-06-05 16:06:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:08,844 INFO L482 AbstractCegarLoop]: Abstraction has 2233 states and 6757 transitions. [2021-06-05 16:06:08,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 16:06:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 6757 transitions. [2021-06-05 16:06:08,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 16:06:08,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:08,849 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:09,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:09,065 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:09,065 INFO L82 PathProgramCache]: Analyzing trace with hash -337432434, now seen corresponding path program 6 times [2021-06-05 16:06:09,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:09,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776484745] [2021-06-05 16:06:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:09,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:09,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776484745] [2021-06-05 16:06:09,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776484745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:09,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893046003] [2021-06-05 16:06:09,284 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 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 16:06:09,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:06:09,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:06:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:09,592 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_1], 1=[v_prenex_3]} [2021-06-05 16:06:09,598 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 5 treesize of output 3 [2021-06-05 16:06:09,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:09,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:09,637 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 7 treesize of output 3 [2021-06-05 16:06:09,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:09,691 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-06-05 16:06:09,697 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:06:09,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 16:06:09,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:09,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:09,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:06:09,722 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:105, output treesize:63 [2021-06-05 16:06:09,821 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:06:09,821 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 18 treesize of output 10 [2021-06-05 16:06:09,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:09,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:09,824 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 16:06:09,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:3 [2021-06-05 16:06:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:06:09,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893046003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:09,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:09,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2021-06-05 16:06:09,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522655852] [2021-06-05 16:06:09,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:06:09,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:09,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:06:09,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:06:09,879 INFO L87 Difference]: Start difference. First operand 2233 states and 6757 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:17,532 INFO L93 Difference]: Finished difference Result 11042 states and 32715 transitions. [2021-06-05 16:06:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-06-05 16:06:17,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 16:06:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:17,587 INFO L225 Difference]: With dead ends: 11042 [2021-06-05 16:06:17,588 INFO L226 Difference]: Without dead ends: 9556 [2021-06-05 16:06:17,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11392 ImplicationChecksByTransitivity, 6274.8ms TimeCoverageRelationStatistics Valid=3926, Invalid=22806, Unknown=0, NotChecked=0, Total=26732 [2021-06-05 16:06:17,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-06-05 16:06:17,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 3753. [2021-06-05 16:06:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 3.0285181236673773) internal successors, (11363), 3752 states have internal predecessors, (11363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 11363 transitions. [2021-06-05 16:06:17,759 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 11363 transitions. Word has length 42 [2021-06-05 16:06:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:17,760 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 11363 transitions. [2021-06-05 16:06:17,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 11363 transitions. [2021-06-05 16:06:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 16:06:17,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:17,770 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:17,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 16:06:17,985 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:17,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1703826358, now seen corresponding path program 7 times [2021-06-05 16:06:17,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:17,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431465680] [2021-06-05 16:06:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:18,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:18,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431465680] [2021-06-05 16:06:18,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431465680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:18,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109659894] [2021-06-05 16:06:18,202 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 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 16:06:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:18,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:06:18,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:18,378 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 17 treesize of output 13 [2021-06-05 16:06:18,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:18,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:18,388 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 16:06:18,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-05 16:06:18,622 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_9, q3, v_prenex_12, v_prenex_5], 1=[q1, v_prenex_6], 3=[v_prenex_11]} [2021-06-05 16:06:18,634 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 17 treesize of output 9 [2021-06-05 16:06:18,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:18,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:18,692 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 13 treesize of output 9 [2021-06-05 16:06:18,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:18,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:18,765 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 7 treesize of output 5 [2021-06-05 16:06:18,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:18,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:18,809 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 17 treesize of output 9 [2021-06-05 16:06:18,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:18,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:18,856 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:06:18,856 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 24 treesize of output 12 [2021-06-05 16:06:18,857 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:18,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:18,897 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:06:18,897 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 11 [2021-06-05 16:06:18,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:18,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:18,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:18,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:18,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:18,937 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 29 treesize of output 15 [2021-06-05 16:06:18,939 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:18,943 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:06:18,943 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 22 treesize of output 12 [2021-06-05 16:06:18,944 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:18,977 INFO L628 ElimStorePlain]: treesize reduction 15, result has 74.1 percent of original size [2021-06-05 16:06:18,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 7 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:06:18,978 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 14 variables, input treesize:179, output treesize:43 [2021-06-05 16:06:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:19,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109659894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:19,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:19,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 16:06:19,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301349064] [2021-06-05 16:06:19,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:06:19,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:19,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:06:19,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:06:19,173 INFO L87 Difference]: Start difference. First operand 3753 states and 11363 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:21,252 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 16:06:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:21,958 INFO L93 Difference]: Finished difference Result 11827 states and 35204 transitions. [2021-06-05 16:06:21,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:06:21,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 16:06:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:21,984 INFO L225 Difference]: With dead ends: 11827 [2021-06-05 16:06:21,984 INFO L226 Difference]: Without dead ends: 10164 [2021-06-05 16:06:21,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 2411.7ms TimeCoverageRelationStatistics Valid=728, Invalid=3694, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:06:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10164 states. [2021-06-05 16:06:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10164 to 3828. [2021-06-05 16:06:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.02874314084139) internal successors, (11591), 3827 states have internal predecessors, (11591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11591 transitions. [2021-06-05 16:06:22,146 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11591 transitions. Word has length 42 [2021-06-05 16:06:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:22,146 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 11591 transitions. [2021-06-05 16:06:22,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11591 transitions. [2021-06-05 16:06:22,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 16:06:22,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:22,156 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:22,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:22,369 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:22,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:22,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1100727138, now seen corresponding path program 8 times [2021-06-05 16:06:22,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:22,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706425783] [2021-06-05 16:06:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:22,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:22,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706425783] [2021-06-05 16:06:22,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706425783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:22,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230496831] [2021-06-05 16:06:22,575 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 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 16:06:22,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:06:22,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:22,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:06:22,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:22,821 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_18], 1=[v_prenex_16]} [2021-06-05 16:06:22,825 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 5 treesize of output 3 [2021-06-05 16:06:22,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:22,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:22,863 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 7 treesize of output 3 [2021-06-05 16:06:22,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:22,907 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-06-05 16:06:22,911 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:06:22,911 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 11 treesize of output 5 [2021-06-05 16:06:22,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:22,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:22,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:06:22,941 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:105, output treesize:63 [2021-06-05 16:06:23,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:23,009 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 18 treesize of output 10 [2021-06-05 16:06:23,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:23,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:23,019 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 13 [2021-06-05 16:06:23,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:23,025 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:06:23,026 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 13 treesize of output 7 [2021-06-05 16:06:23,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:23,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:23,047 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 16:06:23,047 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:78, output treesize:31 [2021-06-05 16:06:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:23,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230496831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:23,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:23,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2021-06-05 16:06:23,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340141218] [2021-06-05 16:06:23,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:06:23,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:23,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:06:23,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:06:23,199 INFO L87 Difference]: Start difference. First operand 3828 states and 11591 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:33,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:33,486 INFO L93 Difference]: Finished difference Result 14066 states and 41923 transitions. [2021-06-05 16:06:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-06-05 16:06:33,486 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 16:06:33,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:33,510 INFO L225 Difference]: With dead ends: 14066 [2021-06-05 16:06:33,510 INFO L226 Difference]: Without dead ends: 12367 [2021-06-05 16:06:33,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13054 ImplicationChecksByTransitivity, 9225.4ms TimeCoverageRelationStatistics Valid=4398, Invalid=26402, Unknown=0, NotChecked=0, Total=30800 [2021-06-05 16:06:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12367 states. [2021-06-05 16:06:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12367 to 3970. [2021-06-05 16:06:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3970 states, 3969 states have (on average 3.0330057949105567) internal successors, (12038), 3969 states have internal predecessors, (12038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3970 states to 3970 states and 12038 transitions. [2021-06-05 16:06:33,652 INFO L78 Accepts]: Start accepts. Automaton has 3970 states and 12038 transitions. Word has length 42 [2021-06-05 16:06:33,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:33,653 INFO L482 AbstractCegarLoop]: Abstraction has 3970 states and 12038 transitions. [2021-06-05 16:06:33,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:33,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3970 states and 12038 transitions. [2021-06-05 16:06:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 16:06:33,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:33,662 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:33,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:33,885 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1161843202, now seen corresponding path program 9 times [2021-06-05 16:06:33,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:33,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215127293] [2021-06-05 16:06:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:34,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:34,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215127293] [2021-06-05 16:06:34,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215127293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:34,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9068549] [2021-06-05 16:06:34,094 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 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 16:06:34,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:06:34,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:34,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:06:34,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:34,373 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_19], 1=[v_prenex_21]} [2021-06-05 16:06:34,377 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 5 treesize of output 3 [2021-06-05 16:06:34,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:34,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:34,431 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 7 treesize of output 3 [2021-06-05 16:06:34,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:34,485 INFO L628 ElimStorePlain]: treesize reduction 22, result has 79.0 percent of original size [2021-06-05 16:06:34,490 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:06:34,490 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 11 treesize of output 5 [2021-06-05 16:06:34,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:34,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:34,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:06:34,515 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:117, output treesize:72 [2021-06-05 16:06:34,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:34,592 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 18 treesize of output 10 [2021-06-05 16:06:34,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:34,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:34,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:34,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:34,602 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 13 [2021-06-05 16:06:34,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:34,608 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:06:34,608 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 13 treesize of output 7 [2021-06-05 16:06:34,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:34,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:34,630 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 16:06:34,631 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:87, output treesize:40 [2021-06-05 16:06:34,920 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 5 treesize of output 3 [2021-06-05 16:06:34,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:34,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:34,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:34,926 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:06:34,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:34,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:34,931 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 11 treesize of output 7 [2021-06-05 16:06:34,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:34,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:34,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:06:34,956 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:66, output treesize:31 [2021-06-05 16:06:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:35,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9068549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:35,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:35,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-05 16:06:35,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411762299] [2021-06-05 16:06:35,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:06:35,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:35,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:06:35,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:06:35,053 INFO L87 Difference]: Start difference. First operand 3970 states and 12038 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:44,405 INFO L93 Difference]: Finished difference Result 11155 states and 33205 transitions. [2021-06-05 16:06:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 16:06:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 16:06:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:44,424 INFO L225 Difference]: With dead ends: 11155 [2021-06-05 16:06:44,424 INFO L226 Difference]: Without dead ends: 8967 [2021-06-05 16:06:44,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9529 ImplicationChecksByTransitivity, 8211.4ms TimeCoverageRelationStatistics Valid=3798, Invalid=21008, Unknown=0, NotChecked=0, Total=24806 [2021-06-05 16:06:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8967 states. [2021-06-05 16:06:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8967 to 3852. [2021-06-05 16:06:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 2.9968839262529214) internal successors, (11541), 3851 states have internal predecessors, (11541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 11541 transitions. [2021-06-05 16:06:44,531 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 11541 transitions. Word has length 42 [2021-06-05 16:06:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:44,531 INFO L482 AbstractCegarLoop]: Abstraction has 3852 states and 11541 transitions. [2021-06-05 16:06:44,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 11541 transitions. [2021-06-05 16:06:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 16:06:44,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:44,540 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:44,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 16:06:44,753 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:44,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:44,753 INFO L82 PathProgramCache]: Analyzing trace with hash 610965756, now seen corresponding path program 10 times [2021-06-05 16:06:44,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:44,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978910965] [2021-06-05 16:06:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:45,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:45,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978910965] [2021-06-05 16:06:45,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978910965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:45,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783571043] [2021-06-05 16:06:45,007 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 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 16:06:45,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:06:45,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:45,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:06:45,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:45,156 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:06:45,156 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 18 treesize of output 10 [2021-06-05 16:06:45,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:45,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:45,159 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 16:06:45,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:3 [2021-06-05 16:06:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 16:06:45,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783571043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:45,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:45,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 22 [2021-06-05 16:06:45,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555241413] [2021-06-05 16:06:45,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:06:45,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:45,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:06:45,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:06:45,218 INFO L87 Difference]: Start difference. First operand 3852 states and 11541 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:49,241 INFO L93 Difference]: Finished difference Result 14466 states and 42669 transitions. [2021-06-05 16:06:49,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-06-05 16:06:49,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 16:06:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:49,265 INFO L225 Difference]: With dead ends: 14466 [2021-06-05 16:06:49,266 INFO L226 Difference]: Without dead ends: 14073 [2021-06-05 16:06:49,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9648 ImplicationChecksByTransitivity, 3170.8ms TimeCoverageRelationStatistics Valid=2981, Invalid=20581, Unknown=0, NotChecked=0, Total=23562 [2021-06-05 16:06:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14073 states. [2021-06-05 16:06:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14073 to 4774. [2021-06-05 16:06:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4774 states, 4773 states have (on average 2.9882673371045465) internal successors, (14263), 4773 states have internal predecessors, (14263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4774 states to 4774 states and 14263 transitions. [2021-06-05 16:06:49,416 INFO L78 Accepts]: Start accepts. Automaton has 4774 states and 14263 transitions. Word has length 44 [2021-06-05 16:06:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:49,416 INFO L482 AbstractCegarLoop]: Abstraction has 4774 states and 14263 transitions. [2021-06-05 16:06:49,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:49,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4774 states and 14263 transitions. [2021-06-05 16:06:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 16:06:49,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:49,430 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:49,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 16:06:49,653 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash 893511408, now seen corresponding path program 11 times [2021-06-05 16:06:49,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:49,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718195204] [2021-06-05 16:06:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:49,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:49,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718195204] [2021-06-05 16:06:49,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718195204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:49,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084988800] [2021-06-05 16:06:49,886 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 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 16:06:49,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:06:49,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:49,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:06:49,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:50,135 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:06:50,135 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 18 treesize of output 10 [2021-06-05 16:06:50,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:50,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:50,138 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 16:06:50,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:3 [2021-06-05 16:06:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:06:50,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084988800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:50,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:50,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2021-06-05 16:06:50,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856477885] [2021-06-05 16:06:50,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:06:50,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:50,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:06:50,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:06:50,183 INFO L87 Difference]: Start difference. First operand 4774 states and 14263 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:56,555 INFO L93 Difference]: Finished difference Result 18190 states and 53987 transitions. [2021-06-05 16:06:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-05 16:06:56,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 16:06:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:56,582 INFO L225 Difference]: With dead ends: 18190 [2021-06-05 16:06:56,582 INFO L226 Difference]: Without dead ends: 15389 [2021-06-05 16:06:56,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13726 ImplicationChecksByTransitivity, 5270.1ms TimeCoverageRelationStatistics Valid=4181, Invalid=28039, Unknown=0, NotChecked=0, Total=32220 [2021-06-05 16:06:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15389 states. [2021-06-05 16:06:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15389 to 5222. [2021-06-05 16:06:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5221 states have (on average 2.981421183681287) internal successors, (15566), 5221 states have internal predecessors, (15566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 15566 transitions. [2021-06-05 16:06:56,800 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 15566 transitions. Word has length 44 [2021-06-05 16:06:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:56,800 INFO L482 AbstractCegarLoop]: Abstraction has 5222 states and 15566 transitions. [2021-06-05 16:06:56,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 15566 transitions. [2021-06-05 16:06:56,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 16:06:56,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:56,811 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:57,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 16:06:57,025 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:57,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1369693409, now seen corresponding path program 12 times [2021-06-05 16:06:57,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:57,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547464424] [2021-06-05 16:06:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 16:06:57,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547464424] [2021-06-05 16:06:57,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547464424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745571485] [2021-06-05 16:06:57,066 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 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 16:06:57,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 16:06:57,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:57,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:06:57,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:57,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:57,187 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 15 treesize of output 7 [2021-06-05 16:06:57,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:57,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:57,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:57,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:06:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 16:06:57,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745571485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:57,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:57,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-06-05 16:06:57,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781600139] [2021-06-05 16:06:57,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:06:57,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:57,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:06:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:06:57,245 INFO L87 Difference]: Start difference. First operand 5222 states and 15566 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 16:06:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:57,321 INFO L93 Difference]: Finished difference Result 10571 states and 31484 transitions. [2021-06-05 16:06:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:06:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 49 [2021-06-05 16:06:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:57,339 INFO L225 Difference]: With dead ends: 10571 [2021-06-05 16:06:57,340 INFO L226 Difference]: Without dead ends: 10541 [2021-06-05 16:06:57,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:06:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10541 states. [2021-06-05 16:06:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10541 to 8733. [2021-06-05 16:06:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8733 states, 8732 states have (on average 3.02370590929913) internal successors, (26403), 8732 states have internal predecessors, (26403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8733 states to 8733 states and 26403 transitions. [2021-06-05 16:06:57,537 INFO L78 Accepts]: Start accepts. Automaton has 8733 states and 26403 transitions. Word has length 49 [2021-06-05 16:06:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:57,538 INFO L482 AbstractCegarLoop]: Abstraction has 8733 states and 26403 transitions. [2021-06-05 16:06:57,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 16:06:57,538 INFO L276 IsEmpty]: Start isEmpty. Operand 8733 states and 26403 transitions. [2021-06-05 16:06:57,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 16:06:57,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:57,555 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:57,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 16:06:57,769 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:57,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:57,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2045512635, now seen corresponding path program 13 times [2021-06-05 16:06:57,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:57,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670838744] [2021-06-05 16:06:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:57,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:57,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670838744] [2021-06-05 16:06:57,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670838744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:57,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032354169] [2021-06-05 16:06:57,968 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 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 16:06:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:58,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:06:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:58,113 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:06:58,113 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 22 treesize of output 10 [2021-06-05 16:06:58,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:58,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:58,118 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 16:06:58,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-05 16:06:58,203 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 16:06:58,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:58,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:58,206 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 16:06:58,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 16:06:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:06:58,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032354169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:58,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:58,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-05 16:06:58,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073520601] [2021-06-05 16:06:58,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:06:58,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:58,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:06:58,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:06:58,257 INFO L87 Difference]: Start difference. First operand 8733 states and 26403 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:00,249 INFO L93 Difference]: Finished difference Result 23995 states and 72339 transitions. [2021-06-05 16:07:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:07:00,250 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 16:07:00,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:00,280 INFO L225 Difference]: With dead ends: 23995 [2021-06-05 16:07:00,280 INFO L226 Difference]: Without dead ends: 22434 [2021-06-05 16:07:00,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 1511.4ms TimeCoverageRelationStatistics Valid=652, Invalid=4750, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 16:07:00,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22434 states. [2021-06-05 16:07:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22434 to 12965. [2021-06-05 16:07:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12965 states, 12964 states have (on average 3.03139463128664) internal successors, (39299), 12964 states have internal predecessors, (39299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12965 states to 12965 states and 39299 transitions. [2021-06-05 16:07:00,596 INFO L78 Accepts]: Start accepts. Automaton has 12965 states and 39299 transitions. Word has length 49 [2021-06-05 16:07:00,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:00,597 INFO L482 AbstractCegarLoop]: Abstraction has 12965 states and 39299 transitions. [2021-06-05 16:07:00,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:00,597 INFO L276 IsEmpty]: Start isEmpty. Operand 12965 states and 39299 transitions. [2021-06-05 16:07:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 16:07:00,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:00,621 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:00,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:00,837 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1639678941, now seen corresponding path program 14 times [2021-06-05 16:07:00,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:00,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301715308] [2021-06-05 16:07:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:00,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:00,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301715308] [2021-06-05 16:07:00,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301715308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:00,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036314459] [2021-06-05 16:07:00,948 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 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 16:07:00,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:07:00,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:00,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:07:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:01,083 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:07:01,083 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 18 treesize of output 10 [2021-06-05 16:07:01,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:01,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:01,089 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 16:07:01,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:9 [2021-06-05 16:07:01,164 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 16:07:01,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:01,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:01,167 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 16:07:01,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 16:07:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:07:01,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036314459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:01,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:01,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 16:07:01,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657089335] [2021-06-05 16:07:01,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:07:01,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:01,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:07:01,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:07:01,208 INFO L87 Difference]: Start difference. First operand 12965 states and 39299 transitions. Second operand has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 21 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:04,727 INFO L93 Difference]: Finished difference Result 29303 states and 86448 transitions. [2021-06-05 16:07:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 16:07:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 21 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 16:07:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:04,767 INFO L225 Difference]: With dead ends: 29303 [2021-06-05 16:07:04,767 INFO L226 Difference]: Without dead ends: 26445 [2021-06-05 16:07:04,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7651 ImplicationChecksByTransitivity, 2449.3ms TimeCoverageRelationStatistics Valid=2807, Invalid=15825, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 16:07:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26445 states. [2021-06-05 16:07:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26445 to 13262. [2021-06-05 16:07:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13262 states, 13261 states have (on average 3.0076163185280147) internal successors, (39884), 13261 states have internal predecessors, (39884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 39884 transitions. [2021-06-05 16:07:05,104 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 39884 transitions. Word has length 49 [2021-06-05 16:07:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:05,105 INFO L482 AbstractCegarLoop]: Abstraction has 13262 states and 39884 transitions. [2021-06-05 16:07:05,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 21 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 39884 transitions. [2021-06-05 16:07:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 16:07:05,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:05,129 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:05,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 16:07:05,345 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:05,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1094414023, now seen corresponding path program 15 times [2021-06-05 16:07:05,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:05,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127319543] [2021-06-05 16:07:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:05,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:05,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127319543] [2021-06-05 16:07:05,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127319543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:05,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923217103] [2021-06-05 16:07:05,574 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 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 16:07:05,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:07:05,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:05,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:07:05,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:05,756 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:07:05,756 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 22 treesize of output 10 [2021-06-05 16:07:05,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:05,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:05,762 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 16:07:05,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-05 16:07:05,946 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 15 treesize of output 7 [2021-06-05 16:07:05,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:05,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:05,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:05,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 16:07:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:06,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923217103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:06,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:06,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-06-05 16:07:06,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902046735] [2021-06-05 16:07:06,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:07:06,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:06,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:07:06,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:07:06,015 INFO L87 Difference]: Start difference. First operand 13262 states and 39884 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:12,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:12,621 INFO L93 Difference]: Finished difference Result 35518 states and 106381 transitions. [2021-06-05 16:07:12,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-05 16:07:12,621 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 16:07:12,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:12,666 INFO L225 Difference]: With dead ends: 35518 [2021-06-05 16:07:12,666 INFO L226 Difference]: Without dead ends: 33568 [2021-06-05 16:07:12,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13705 ImplicationChecksByTransitivity, 5232.3ms TimeCoverageRelationStatistics Valid=4855, Invalid=29555, Unknown=0, NotChecked=0, Total=34410 [2021-06-05 16:07:12,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33568 states. [2021-06-05 16:07:12,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33568 to 17682. [2021-06-05 16:07:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17682 states, 17681 states have (on average 3.0209264181890165) internal successors, (53413), 17681 states have internal predecessors, (53413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17682 states to 17682 states and 53413 transitions. [2021-06-05 16:07:12,994 INFO L78 Accepts]: Start accepts. Automaton has 17682 states and 53413 transitions. Word has length 49 [2021-06-05 16:07:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:12,994 INFO L482 AbstractCegarLoop]: Abstraction has 17682 states and 53413 transitions. [2021-06-05 16:07:12,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 17682 states and 53413 transitions. [2021-06-05 16:07:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 16:07:13,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:13,014 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:13,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:13,215 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:13,215 INFO L82 PathProgramCache]: Analyzing trace with hash -857147075, now seen corresponding path program 16 times [2021-06-05 16:07:13,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:13,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764074427] [2021-06-05 16:07:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:13,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764074427] [2021-06-05 16:07:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764074427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194347778] [2021-06-05 16:07:13,405 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 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 16:07:13,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:07:13,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:13,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:07:13,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:13,611 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 21 treesize of output 13 [2021-06-05 16:07:13,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:13,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:13,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:13,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:33 [2021-06-05 16:07:13,842 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-06-05 16:07:13,961 INFO L446 ElimStorePlain]: Different costs {0=[q3], 1=[v_prenex_28], 3=[q1, v_prenex_27]} [2021-06-05 16:07:13,965 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 17 treesize of output 13 [2021-06-05 16:07:13,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:14,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:14,011 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 21 treesize of output 13 [2021-06-05 16:07:14,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:14,017 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:07:14,017 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 25 treesize of output 15 [2021-06-05 16:07:14,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:14,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:14,052 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:07:14,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 16:07:14,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:14,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:14,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:14,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:14,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:14,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 16:07:14,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:14,092 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:07:14,092 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 15 treesize of output 7 [2021-06-05 16:07:14,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:14,120 INFO L628 ElimStorePlain]: treesize reduction 12, result has 71.4 percent of original size [2021-06-05 16:07:14,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:07:14,121 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:146, output treesize:28 [2021-06-05 16:07:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:14,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194347778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:14,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:14,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-05 16:07:14,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069626777] [2021-06-05 16:07:14,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:07:14,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:14,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:07:14,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:07:14,173 INFO L87 Difference]: Start difference. First operand 17682 states and 53413 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:16,620 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-05 16:07:17,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:17,428 INFO L93 Difference]: Finished difference Result 32635 states and 97607 transitions. [2021-06-05 16:07:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 16:07:17,428 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 16:07:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:17,476 INFO L225 Difference]: With dead ends: 32635 [2021-06-05 16:07:17,477 INFO L226 Difference]: Without dead ends: 29107 [2021-06-05 16:07:17,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2713.5ms TimeCoverageRelationStatistics Valid=817, Invalid=6323, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:07:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29107 states. [2021-06-05 16:07:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29107 to 19560. [2021-06-05 16:07:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19560 states, 19559 states have (on average 3.0155427169078175) internal successors, (58981), 19559 states have internal predecessors, (58981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:17,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19560 states to 19560 states and 58981 transitions. [2021-06-05 16:07:17,817 INFO L78 Accepts]: Start accepts. Automaton has 19560 states and 58981 transitions. Word has length 49 [2021-06-05 16:07:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:17,817 INFO L482 AbstractCegarLoop]: Abstraction has 19560 states and 58981 transitions. [2021-06-05 16:07:17,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand 19560 states and 58981 transitions. [2021-06-05 16:07:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 16:07:17,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:17,842 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:18,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 16:07:18,049 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:18,049 INFO L82 PathProgramCache]: Analyzing trace with hash 939243943, now seen corresponding path program 17 times [2021-06-05 16:07:18,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:18,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045273345] [2021-06-05 16:07:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:18,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:18,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045273345] [2021-06-05 16:07:18,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045273345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:18,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74634352] [2021-06-05 16:07:18,238 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 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 16:07:18,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:07:18,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:18,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:07:18,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:18,396 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:07:18,396 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 18 treesize of output 10 [2021-06-05 16:07:18,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:18,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:18,411 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 16:07:18,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:9 [2021-06-05 16:07:18,472 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 16:07:18,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:18,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:18,475 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 16:07:18,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 16:07:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:18,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74634352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:18,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:18,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-06-05 16:07:18,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781429680] [2021-06-05 16:07:18,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:07:18,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:07:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:07:18,529 INFO L87 Difference]: Start difference. First operand 19560 states and 58981 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:22,443 INFO L93 Difference]: Finished difference Result 49644 states and 149422 transitions. [2021-06-05 16:07:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 16:07:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 16:07:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:22,509 INFO L225 Difference]: With dead ends: 49644 [2021-06-05 16:07:22,509 INFO L226 Difference]: Without dead ends: 46702 [2021-06-05 16:07:22,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4141 ImplicationChecksByTransitivity, 2754.2ms TimeCoverageRelationStatistics Valid=2056, Invalid=10826, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 16:07:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46702 states. [2021-06-05 16:07:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46702 to 28803. [2021-06-05 16:07:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28803 states, 28802 states have (on average 3.0261440177765433) internal successors, (87159), 28802 states have internal predecessors, (87159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28803 states to 28803 states and 87159 transitions. [2021-06-05 16:07:23,095 INFO L78 Accepts]: Start accepts. Automaton has 28803 states and 87159 transitions. Word has length 49 [2021-06-05 16:07:23,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:23,096 INFO L482 AbstractCegarLoop]: Abstraction has 28803 states and 87159 transitions. [2021-06-05 16:07:23,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:23,096 INFO L276 IsEmpty]: Start isEmpty. Operand 28803 states and 87159 transitions. [2021-06-05 16:07:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 16:07:23,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:23,144 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:23,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:23,346 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:23,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1482469265, now seen corresponding path program 18 times [2021-06-05 16:07:23,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:23,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193169474] [2021-06-05 16:07:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:07:23,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:23,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193169474] [2021-06-05 16:07:23,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193169474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:23,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774338234] [2021-06-05 16:07:23,580 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 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 16:07:23,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:07:23,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:23,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:07:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:23,958 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 7 treesize of output 3 [2021-06-05 16:07:23,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:24,009 INFO L628 ElimStorePlain]: treesize reduction 34, result has 68.2 percent of original size [2021-06-05 16:07:24,009 INFO L518 ElimStorePlain]: Eliminatee v_prenex_31 vanished before elimination [2021-06-05 16:07:24,010 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 16:07:24,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:114, output treesize:71 [2021-06-05 16:07:24,099 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:07:24,100 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:07:24,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:24,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:24,104 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 16:07:24,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:7 [2021-06-05 16:07:24,157 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 16:07:24,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:24,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:24,160 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 16:07:24,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 16:07:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:07:24,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774338234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:24,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:24,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-06-05 16:07:24,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818248328] [2021-06-05 16:07:24,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:07:24,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:24,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:07:24,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:07:24,201 INFO L87 Difference]: Start difference. First operand 28803 states and 87159 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:25,310 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-06-05 16:07:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:30,544 INFO L93 Difference]: Finished difference Result 62509 states and 189125 transitions. [2021-06-05 16:07:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 16:07:30,544 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 16:07:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:30,635 INFO L225 Difference]: With dead ends: 62509 [2021-06-05 16:07:30,636 INFO L226 Difference]: Without dead ends: 55884 [2021-06-05 16:07:30,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5341 ImplicationChecksByTransitivity, 4746.2ms TimeCoverageRelationStatistics Valid=2397, Invalid=13605, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 16:07:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55884 states. [2021-06-05 16:07:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55884 to 36502. [2021-06-05 16:07:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36502 states, 36501 states have (on average 3.0240541355031367) internal successors, (110381), 36501 states have internal predecessors, (110381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36502 states to 36502 states and 110381 transitions. [2021-06-05 16:07:31,270 INFO L78 Accepts]: Start accepts. Automaton has 36502 states and 110381 transitions. Word has length 49 [2021-06-05 16:07:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:31,270 INFO L482 AbstractCegarLoop]: Abstraction has 36502 states and 110381 transitions. [2021-06-05 16:07:31,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 36502 states and 110381 transitions. [2021-06-05 16:07:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 16:07:31,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:31,317 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:31,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 16:07:31,519 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:31,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:31,519 INFO L82 PathProgramCache]: Analyzing trace with hash -742740465, now seen corresponding path program 19 times [2021-06-05 16:07:31,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:31,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973887297] [2021-06-05 16:07:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:31,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:31,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973887297] [2021-06-05 16:07:31,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973887297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:31,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974912308] [2021-06-05 16:07:31,924 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 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 16:07:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:32,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:07:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:32,193 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 21 treesize of output 13 [2021-06-05 16:07:32,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:32,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:26 [2021-06-05 16:07:32,501 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_40], 1=[v_prenex_34, v_prenex_33], 3=[q1, v_prenex_39]} [2021-06-05 16:07:32,506 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 17 treesize of output 13 [2021-06-05 16:07:32,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:32,552 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 21 treesize of output 13 [2021-06-05 16:07:32,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:32,607 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:07:32,608 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 25 treesize of output 15 [2021-06-05 16:07:32,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:32,657 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:07:32,658 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 15 treesize of output 7 [2021-06-05 16:07:32,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:32,690 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:07:32,690 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 16:07:32,692 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:32,716 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:07:32,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 16:07:32,718 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,744 INFO L628 ElimStorePlain]: treesize reduction 12, result has 73.9 percent of original size [2021-06-05 16:07:32,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:07:32,745 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:150, output treesize:32 [2021-06-05 16:07:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:07:32,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974912308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:32,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:32,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-06-05 16:07:32,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453053749] [2021-06-05 16:07:32,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:07:32,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:32,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:07:32,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:07:32,793 INFO L87 Difference]: Start difference. First operand 36502 states and 110381 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:35,047 INFO L93 Difference]: Finished difference Result 48359 states and 145089 transitions. [2021-06-05 16:07:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:07:35,056 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 16:07:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:35,132 INFO L225 Difference]: With dead ends: 48359 [2021-06-05 16:07:35,132 INFO L226 Difference]: Without dead ends: 46710 [2021-06-05 16:07:35,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2120.4ms TimeCoverageRelationStatistics Valid=565, Invalid=3341, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:07:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46710 states. [2021-06-05 16:07:35,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46710 to 36654. [2021-06-05 16:07:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36654 states, 36653 states have (on average 3.0235178566556624) internal successors, (110821), 36653 states have internal predecessors, (110821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36654 states to 36654 states and 110821 transitions. [2021-06-05 16:07:35,975 INFO L78 Accepts]: Start accepts. Automaton has 36654 states and 110821 transitions. Word has length 49 [2021-06-05 16:07:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:35,975 INFO L482 AbstractCegarLoop]: Abstraction has 36654 states and 110821 transitions. [2021-06-05 16:07:35,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 36654 states and 110821 transitions. [2021-06-05 16:07:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 16:07:36,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:36,024 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:36,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 16:07:36,231 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:36,231 INFO L82 PathProgramCache]: Analyzing trace with hash -549490785, now seen corresponding path program 20 times [2021-06-05 16:07:36,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:36,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464274963] [2021-06-05 16:07:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:07:36,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:36,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464274963] [2021-06-05 16:07:36,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464274963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:36,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223875715] [2021-06-05 16:07:36,342 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 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 16:07:36,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:07:36,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:36,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:07:36,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:36,538 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:07:36,539 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 18 treesize of output 10 [2021-06-05 16:07:36,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:36,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:36,543 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 16:07:36,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:9 [2021-06-05 16:07:36,592 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 16:07:36,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:36,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:36,595 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 16:07:36,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 16:07:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:07:36,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223875715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:36,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:36,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 16:07:36,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197327893] [2021-06-05 16:07:36,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:07:36,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:36,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:07:36,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:07:36,635 INFO L87 Difference]: Start difference. First operand 36654 states and 110821 transitions. Second operand has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:39,548 INFO L93 Difference]: Finished difference Result 103049 states and 309241 transitions. [2021-06-05 16:07:39,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 16:07:39,548 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 16:07:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:39,727 INFO L225 Difference]: With dead ends: 103049 [2021-06-05 16:07:39,727 INFO L226 Difference]: Without dead ends: 102356 [2021-06-05 16:07:39,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4810 ImplicationChecksByTransitivity, 1938.3ms TimeCoverageRelationStatistics Valid=2216, Invalid=10216, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 16:07:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102356 states. [2021-06-05 16:07:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102356 to 42498. [2021-06-05 16:07:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42498 states, 42497 states have (on average 3.0068946043250113) internal successors, (127784), 42497 states have internal predecessors, (127784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42498 states to 42498 states and 127784 transitions. [2021-06-05 16:07:41,214 INFO L78 Accepts]: Start accepts. Automaton has 42498 states and 127784 transitions. Word has length 51 [2021-06-05 16:07:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:41,214 INFO L482 AbstractCegarLoop]: Abstraction has 42498 states and 127784 transitions. [2021-06-05 16:07:41,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 42498 states and 127784 transitions. [2021-06-05 16:07:41,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 16:07:41,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:41,262 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:41,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:41,463 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:41,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:41,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1690828025, now seen corresponding path program 21 times [2021-06-05 16:07:41,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:41,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797480988] [2021-06-05 16:07:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:07:41,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:41,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797480988] [2021-06-05 16:07:41,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797480988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:41,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218889209] [2021-06-05 16:07:41,830 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 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 16:07:41,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:07:41,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:41,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:07:41,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:42,159 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_43, v_prenex_45], 1=[q3]} [2021-06-05 16:07:42,163 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 7 treesize of output 3 [2021-06-05 16:07:42,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:42,220 INFO L628 ElimStorePlain]: treesize reduction 31, result has 75.4 percent of original size [2021-06-05 16:07:42,220 INFO L518 ElimStorePlain]: Eliminatee v_prenex_45 vanished before elimination [2021-06-05 16:07:42,224 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:07:42,224 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 11 treesize of output 5 [2021-06-05 16:07:42,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:42,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:42,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:07:42,249 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:133, output treesize:84 [2021-06-05 16:07:42,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:42,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:42,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:42,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:07:42,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:42,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:42,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 16:07:42,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:42,341 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:07:42,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:07:42,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:42,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:42,357 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 16:07:42,357 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:99, output treesize:31 [2021-06-05 16:07:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:42,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218889209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:42,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:42,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-06-05 16:07:42,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333414497] [2021-06-05 16:07:42,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:07:42,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:07:42,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:07:42,458 INFO L87 Difference]: Start difference. First operand 42498 states and 127784 transitions. Second operand has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:58,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:58,724 INFO L93 Difference]: Finished difference Result 63536 states and 189082 transitions. [2021-06-05 16:07:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2021-06-05 16:07:58,725 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 16:07:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:58,826 INFO L225 Difference]: With dead ends: 63536 [2021-06-05 16:07:58,827 INFO L226 Difference]: Without dead ends: 62627 [2021-06-05 16:07:58,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25551 ImplicationChecksByTransitivity, 14063.2ms TimeCoverageRelationStatistics Valid=6397, Invalid=54859, Unknown=0, NotChecked=0, Total=61256 [2021-06-05 16:07:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62627 states. [2021-06-05 16:07:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62627 to 43408. [2021-06-05 16:07:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43408 states, 43407 states have (on average 3.008708272859216) internal successors, (130599), 43407 states have internal predecessors, (130599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:59,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43408 states to 43408 states and 130599 transitions. [2021-06-05 16:07:59,624 INFO L78 Accepts]: Start accepts. Automaton has 43408 states and 130599 transitions. Word has length 54 [2021-06-05 16:07:59,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:59,624 INFO L482 AbstractCegarLoop]: Abstraction has 43408 states and 130599 transitions. [2021-06-05 16:07:59,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 43408 states and 130599 transitions. [2021-06-05 16:07:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 16:07:59,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:59,676 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:59,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 16:07:59,876 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1977773629, now seen corresponding path program 22 times [2021-06-05 16:07:59,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:59,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650680207] [2021-06-05 16:07:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:08:00,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:00,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650680207] [2021-06-05 16:08:00,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650680207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:00,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992249591] [2021-06-05 16:08:00,069 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 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 16:08:00,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:08:00,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:00,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:08:00,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:00,339 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 17 treesize of output 13 [2021-06-05 16:08:00,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:00,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:00,349 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 16:08:00,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-06-05 16:08:00,722 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 16:08:00,800 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_48], 1=[q3], 3=[q1, v_prenex_47]} [2021-06-05 16:08:00,804 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 21 treesize of output 13 [2021-06-05 16:08:00,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:00,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:00,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:00,858 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 16:08:00,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:00,862 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 21 treesize of output 13 [2021-06-05 16:08:00,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:00,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:00,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:00,901 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 15 treesize of output 7 [2021-06-05 16:08:00,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:00,907 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:08:00,907 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 16:08:00,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:00,933 INFO L628 ElimStorePlain]: treesize reduction 37, result has 44.8 percent of original size [2021-06-05 16:08:00,934 INFO L518 ElimStorePlain]: Eliminatee v_prenex_47 vanished before elimination [2021-06-05 16:08:00,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:08:00,934 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:152, output treesize:28 [2021-06-05 16:08:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:08:00,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992249591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:00,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:00,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 16:08:00,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60449599] [2021-06-05 16:08:00,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:08:00,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:00,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:08:00,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:08:00,989 INFO L87 Difference]: Start difference. First operand 43408 states and 130599 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:01,656 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-06-05 16:08:06,502 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 16:08:06,638 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-05 16:08:07,274 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-06-05 16:08:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:08,216 INFO L93 Difference]: Finished difference Result 57791 states and 173149 transitions. [2021-06-05 16:08:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 16:08:08,216 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 16:08:08,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:08,300 INFO L225 Difference]: With dead ends: 57791 [2021-06-05 16:08:08,300 INFO L226 Difference]: Without dead ends: 55664 [2021-06-05 16:08:08,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8232 ImplicationChecksByTransitivity, 6028.3ms TimeCoverageRelationStatistics Valid=2289, Invalid=19173, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 16:08:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55664 states. [2021-06-05 16:08:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55664 to 42854. [2021-06-05 16:08:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42854 states, 42853 states have (on average 3.0055772057965604) internal successors, (128798), 42853 states have internal predecessors, (128798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42854 states to 42854 states and 128798 transitions. [2021-06-05 16:08:09,199 INFO L78 Accepts]: Start accepts. Automaton has 42854 states and 128798 transitions. Word has length 54 [2021-06-05 16:08:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:09,199 INFO L482 AbstractCegarLoop]: Abstraction has 42854 states and 128798 transitions. [2021-06-05 16:08:09,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 42854 states and 128798 transitions. [2021-06-05 16:08:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 16:08:09,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:09,249 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:09,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 16:08:09,453 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1049833869, now seen corresponding path program 23 times [2021-06-05 16:08:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:09,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194788742] [2021-06-05 16:08:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:08:09,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:09,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194788742] [2021-06-05 16:08:09,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194788742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:09,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003139436] [2021-06-05 16:08:09,548 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 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 16:08:09,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:08:09,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:09,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:08:09,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 16:08:10,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003139436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:10,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:10,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 16:08:10,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793413976] [2021-06-05 16:08:10,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:08:10,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:10,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:08:10,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:08:10,008 INFO L87 Difference]: Start difference. First operand 42854 states and 128798 transitions. Second operand has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:11,452 INFO L93 Difference]: Finished difference Result 74433 states and 223524 transitions. [2021-06-05 16:08:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:08:11,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 16:08:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:11,563 INFO L225 Difference]: With dead ends: 74433 [2021-06-05 16:08:11,564 INFO L226 Difference]: Without dead ends: 73438 [2021-06-05 16:08:11,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1066.5ms TimeCoverageRelationStatistics Valid=493, Invalid=1763, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:08:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73438 states. [2021-06-05 16:08:12,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73438 to 51632. [2021-06-05 16:08:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51632 states, 51631 states have (on average 3.0211307160426877) internal successors, (155984), 51631 states have internal predecessors, (155984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51632 states to 51632 states and 155984 transitions. [2021-06-05 16:08:12,608 INFO L78 Accepts]: Start accepts. Automaton has 51632 states and 155984 transitions. Word has length 54 [2021-06-05 16:08:12,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:12,608 INFO L482 AbstractCegarLoop]: Abstraction has 51632 states and 155984 transitions. [2021-06-05 16:08:12,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 51632 states and 155984 transitions. [2021-06-05 16:08:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 16:08:12,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:12,676 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:12,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:12,877 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:12,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1128532211, now seen corresponding path program 24 times [2021-06-05 16:08:12,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:12,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026560216] [2021-06-05 16:08:12,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:08:13,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:13,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026560216] [2021-06-05 16:08:13,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026560216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:13,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734953885] [2021-06-05 16:08:13,245 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 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 16:08:13,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:08:13,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:13,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:08:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:13,550 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 17 treesize of output 13 [2021-06-05 16:08:13,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:13,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:13,560 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 16:08:13,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-05 16:08:14,218 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_53, v_prenex_55], 1=[v_prenex_51]} [2021-06-05 16:08:14,223 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 24 treesize of output 18 [2021-06-05 16:08:14,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:14,293 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 19 treesize of output 15 [2021-06-05 16:08:14,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,428 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 16:08:14,428 INFO L628 ElimStorePlain]: treesize reduction 7, result has 96.5 percent of original size [2021-06-05 16:08:14,433 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 30 treesize of output 18 [2021-06-05 16:08:14,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,506 INFO L628 ElimStorePlain]: treesize reduction 40, result has 77.7 percent of original size [2021-06-05 16:08:14,511 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:08:14,511 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 34 treesize of output 20 [2021-06-05 16:08:14,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,570 INFO L628 ElimStorePlain]: treesize reduction 7, result has 93.8 percent of original size [2021-06-05 16:08:14,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:08:14,572 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:221, output treesize:102 [2021-06-05 16:08:14,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:14,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:14,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:14,652 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 20 treesize of output 10 [2021-06-05 16:08:14,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:14,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:14,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:14,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:14,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:14,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:08:14,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,732 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:08:14,732 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:08:14,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:14,750 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 16:08:14,750 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:117, output treesize:43 [2021-06-05 16:08:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:08:14,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734953885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:14,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:14,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 16:08:14,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816379261] [2021-06-05 16:08:14,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 16:08:14,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:14,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 16:08:14,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:08:14,917 INFO L87 Difference]: Start difference. First operand 51632 states and 155984 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:16,240 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-05 16:08:16,544 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 16:08:16,762 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2021-06-05 16:08:16,906 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 16:08:17,137 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-06-05 16:08:17,261 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 16:08:17,496 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2021-06-05 16:08:17,877 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2021-06-05 16:08:18,363 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-06-05 16:08:18,852 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 60 [2021-06-05 16:08:19,020 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-06-05 16:08:19,249 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-06-05 16:08:19,412 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-06-05 16:08:19,651 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-05 16:08:19,810 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 16:08:20,343 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 16:08:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:21,758 INFO L93 Difference]: Finished difference Result 61707 states and 185313 transitions. [2021-06-05 16:08:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 16:08:21,758 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 16:08:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:21,849 INFO L225 Difference]: With dead ends: 61707 [2021-06-05 16:08:21,849 INFO L226 Difference]: Without dead ends: 60214 [2021-06-05 16:08:21,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 6453.0ms TimeCoverageRelationStatistics Valid=1318, Invalid=9188, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 16:08:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60214 states. [2021-06-05 16:08:22,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60214 to 51802. [2021-06-05 16:08:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51802 states, 51801 states have (on average 3.0208297137120903) internal successors, (156482), 51801 states have internal predecessors, (156482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51802 states to 51802 states and 156482 transitions. [2021-06-05 16:08:22,685 INFO L78 Accepts]: Start accepts. Automaton has 51802 states and 156482 transitions. Word has length 54 [2021-06-05 16:08:22,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:22,685 INFO L482 AbstractCegarLoop]: Abstraction has 51802 states and 156482 transitions. [2021-06-05 16:08:22,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 51802 states and 156482 transitions. [2021-06-05 16:08:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 16:08:22,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:22,764 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:22,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-05 16:08:22,965 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:22,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1974397899, now seen corresponding path program 25 times [2021-06-05 16:08:22,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:22,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681657512] [2021-06-05 16:08:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:08:23,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:23,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681657512] [2021-06-05 16:08:23,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681657512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:23,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041008093] [2021-06-05 16:08:23,229 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 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 16:08:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:23,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:23,405 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 21 treesize of output 13 [2021-06-05 16:08:23,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:23,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:23,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:23,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-06-05 16:08:23,864 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 16:08:24,293 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_58], 1=[q3], 3=[q1, v_prenex_57]} [2021-06-05 16:08:24,297 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 17 treesize of output 13 [2021-06-05 16:08:24,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:24,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:24,349 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 21 treesize of output 13 [2021-06-05 16:08:24,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:24,355 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:08:24,355 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 25 treesize of output 15 [2021-06-05 16:08:24,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:24,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:24,403 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 15 treesize of output 7 [2021-06-05 16:08:24,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:24,410 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:08:24,410 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 16:08:24,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:24,441 INFO L628 ElimStorePlain]: treesize reduction 37, result has 44.8 percent of original size [2021-06-05 16:08:24,441 INFO L518 ElimStorePlain]: Eliminatee v_prenex_57 vanished before elimination [2021-06-05 16:08:24,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:08:24,442 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:146, output treesize:28 [2021-06-05 16:08:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:08:24,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041008093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:24,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:24,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 16:08:24,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304702688] [2021-06-05 16:08:24,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:08:24,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:24,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:08:24,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:08:24,535 INFO L87 Difference]: Start difference. First operand 51802 states and 156482 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:25,873 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 16:08:26,668 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2021-06-05 16:08:26,846 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-05 16:08:27,629 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 16:08:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:28,243 INFO L93 Difference]: Finished difference Result 67435 states and 201565 transitions. [2021-06-05 16:08:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:08:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 16:08:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:28,353 INFO L225 Difference]: With dead ends: 67435 [2021-06-05 16:08:28,353 INFO L226 Difference]: Without dead ends: 65786 [2021-06-05 16:08:28,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 3587.9ms TimeCoverageRelationStatistics Valid=789, Invalid=4613, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 16:08:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65786 states. [2021-06-05 16:08:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65786 to 51838. [2021-06-05 16:08:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51838 states, 51837 states have (on average 3.020603044157648) internal successors, (156579), 51837 states have internal predecessors, (156579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51838 states to 51838 states and 156579 transitions. [2021-06-05 16:08:29,563 INFO L78 Accepts]: Start accepts. Automaton has 51838 states and 156579 transitions. Word has length 54 [2021-06-05 16:08:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:29,563 INFO L482 AbstractCegarLoop]: Abstraction has 51838 states and 156579 transitions. [2021-06-05 16:08:29,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 51838 states and 156579 transitions. [2021-06-05 16:08:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:08:29,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:29,655 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:29,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:29,855 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1518754715, now seen corresponding path program 26 times [2021-06-05 16:08:29,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:29,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937808633] [2021-06-05 16:08:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:08:30,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:30,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937808633] [2021-06-05 16:08:30,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937808633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:30,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124820862] [2021-06-05 16:08:30,078 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 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 16:08:30,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:08:30,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:30,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:08:30,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:30,290 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 21 treesize of output 13 [2021-06-05 16:08:30,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:30,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:30,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:30,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:40 [2021-06-05 16:08:30,655 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_65], 1=[v_prenex_63], 3=[v_prenex_61], 6=[q1, v_prenex_67]} [2021-06-05 16:08:30,659 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 24 treesize of output 18 [2021-06-05 16:08:30,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:30,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:30,708 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 30 treesize of output 18 [2021-06-05 16:08:30,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:30,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:30,758 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:08:30,759 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 34 treesize of output 20 [2021-06-05 16:08:30,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:30,950 INFO L628 ElimStorePlain]: treesize reduction 7, result has 95.2 percent of original size [2021-06-05 16:08:30,955 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:08:30,955 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 16:08:30,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:30,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:30,994 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-06-05 16:08:30,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 18 [2021-06-05 16:08:30,995 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:31,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:31,025 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:08:31,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 16:08:31,027 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:31,056 INFO L628 ElimStorePlain]: treesize reduction 15, result has 71.2 percent of original size [2021-06-05 16:08:31,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:08:31,057 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:196, output treesize:37 [2021-06-05 16:08:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 16:08:31,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124820862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:31,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:31,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 16:08:31,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357685672] [2021-06-05 16:08:31,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:08:31,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:31,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:08:31,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:08:31,132 INFO L87 Difference]: Start difference. First operand 51838 states and 156579 transitions. Second operand has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:34,318 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 16:08:34,684 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-05 16:08:34,830 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-06-05 16:08:35,080 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 16:08:35,214 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-06-05 16:08:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:37,243 INFO L93 Difference]: Finished difference Result 63014 states and 189832 transitions. [2021-06-05 16:08:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 16:08:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:08:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:37,343 INFO L225 Difference]: With dead ends: 63014 [2021-06-05 16:08:37,343 INFO L226 Difference]: Without dead ends: 62505 [2021-06-05 16:08:37,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 4831.2ms TimeCoverageRelationStatistics Valid=1257, Invalid=11175, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 16:08:37,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62505 states. [2021-06-05 16:08:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62505 to 52176. [2021-06-05 16:08:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52176 states, 52175 states have (on average 3.020776233828462) internal successors, (157609), 52175 states have internal predecessors, (157609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52176 states to 52176 states and 157609 transitions. [2021-06-05 16:08:38,240 INFO L78 Accepts]: Start accepts. Automaton has 52176 states and 157609 transitions. Word has length 56 [2021-06-05 16:08:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:38,240 INFO L482 AbstractCegarLoop]: Abstraction has 52176 states and 157609 transitions. [2021-06-05 16:08:38,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 52176 states and 157609 transitions. [2021-06-05 16:08:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:08:38,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:38,311 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:38,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:38,513 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:38,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:38,514 INFO L82 PathProgramCache]: Analyzing trace with hash 384167611, now seen corresponding path program 27 times [2021-06-05 16:08:38,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:38,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384363343] [2021-06-05 16:08:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:08:38,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:38,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384363343] [2021-06-05 16:08:38,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384363343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:38,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77959715] [2021-06-05 16:08:38,771 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 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 16:08:38,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 16:08:38,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:38,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 16:08:38,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:38,982 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:08:38,982 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:08:38,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:38,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:38,985 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 16:08:38,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-06-05 16:08:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 16:08:39,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77959715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:39,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:39,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 23 [2021-06-05 16:08:39,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637132929] [2021-06-05 16:08:39,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:08:39,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:39,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:08:39,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:08:39,036 INFO L87 Difference]: Start difference. First operand 52176 states and 157609 transitions. Second operand has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:39,538 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 16:08:41,104 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-06-05 16:08:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:47,859 INFO L93 Difference]: Finished difference Result 158134 states and 474113 transitions. [2021-06-05 16:08:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-06-05 16:08:47,859 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:08:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:48,116 INFO L225 Difference]: With dead ends: 158134 [2021-06-05 16:08:48,116 INFO L226 Difference]: Without dead ends: 156093 [2021-06-05 16:08:48,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18881 ImplicationChecksByTransitivity, 7242.1ms TimeCoverageRelationStatistics Valid=6475, Invalid=37415, Unknown=0, NotChecked=0, Total=43890 [2021-06-05 16:08:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156093 states. [2021-06-05 16:08:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156093 to 72800. [2021-06-05 16:08:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72800 states, 72799 states have (on average 3.02181348644899) internal successors, (219985), 72799 states have internal predecessors, (219985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72800 states to 72800 states and 219985 transitions. [2021-06-05 16:08:50,301 INFO L78 Accepts]: Start accepts. Automaton has 72800 states and 219985 transitions. Word has length 56 [2021-06-05 16:08:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:50,301 INFO L482 AbstractCegarLoop]: Abstraction has 72800 states and 219985 transitions. [2021-06-05 16:08:50,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 72800 states and 219985 transitions. [2021-06-05 16:08:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:08:50,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:50,411 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:50,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:50,612 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:50,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1255614645, now seen corresponding path program 28 times [2021-06-05 16:08:50,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:50,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535018603] [2021-06-05 16:08:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:08:50,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:50,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535018603] [2021-06-05 16:08:50,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535018603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:50,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115976473] [2021-06-05 16:08:50,768 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 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 16:08:50,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:08:50,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:50,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:08:50,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:51,004 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 21 treesize of output 13 [2021-06-05 16:08:51,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:51,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:43 [2021-06-05 16:08:51,323 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_72], 1=[q3], 6=[q1, v_prenex_71]} [2021-06-05 16:08:51,326 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 17 treesize of output 13 [2021-06-05 16:08:51,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:51,390 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 21 treesize of output 13 [2021-06-05 16:08:51,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,397 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:08:51,397 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 25 treesize of output 15 [2021-06-05 16:08:51,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:51,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:51,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:51,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:51,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 16:08:51,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,450 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:08:51,450 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 36 treesize of output 18 [2021-06-05 16:08:51,452 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,483 INFO L628 ElimStorePlain]: treesize reduction 44, result has 40.5 percent of original size [2021-06-05 16:08:51,483 INFO L518 ElimStorePlain]: Eliminatee v_prenex_71 vanished before elimination [2021-06-05 16:08:51,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:08:51,484 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:167, output treesize:28 [2021-06-05 16:08:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:08:51,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115976473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:51,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:51,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 16:08:51,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081427224] [2021-06-05 16:08:51,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:08:51,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:08:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:08:51,553 INFO L87 Difference]: Start difference. First operand 72800 states and 219985 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:56,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:56,039 INFO L93 Difference]: Finished difference Result 113403 states and 342039 transitions. [2021-06-05 16:08:56,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 16:08:56,040 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:08:56,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:56,232 INFO L225 Difference]: With dead ends: 113403 [2021-06-05 16:08:56,232 INFO L226 Difference]: Without dead ends: 110881 [2021-06-05 16:08:56,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3469 ImplicationChecksByTransitivity, 2978.5ms TimeCoverageRelationStatistics Valid=1029, Invalid=9071, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 16:08:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110881 states. [2021-06-05 16:08:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110881 to 72688. [2021-06-05 16:08:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72688 states, 72687 states have (on average 3.0223974025616687) internal successors, (219689), 72687 states have internal predecessors, (219689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72688 states to 72688 states and 219689 transitions. [2021-06-05 16:08:57,807 INFO L78 Accepts]: Start accepts. Automaton has 72688 states and 219689 transitions. Word has length 56 [2021-06-05 16:08:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:57,807 INFO L482 AbstractCegarLoop]: Abstraction has 72688 states and 219689 transitions. [2021-06-05 16:08:57,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:57,807 INFO L276 IsEmpty]: Start isEmpty. Operand 72688 states and 219689 transitions. [2021-06-05 16:08:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:08:57,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:57,913 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:58,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:58,115 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:58,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1957956279, now seen corresponding path program 29 times [2021-06-05 16:08:58,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:58,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091084354] [2021-06-05 16:08:58,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:08:58,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:58,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091084354] [2021-06-05 16:08:58,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091084354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:58,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617096942] [2021-06-05 16:08:58,298 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 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 16:08:58,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:08:58,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:58,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:08:58,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:58,813 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:08:58,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:08:58,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:58,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:58,815 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 16:08:58,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:08:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 16:08:58,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617096942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:58,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:58,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2021-06-05 16:08:58,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997598613] [2021-06-05 16:08:58,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:08:58,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:58,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:08:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:08:58,864 INFO L87 Difference]: Start difference. First operand 72688 states and 219689 transitions. Second operand has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:00,334 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 16:09:04,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:04,438 INFO L93 Difference]: Finished difference Result 170493 states and 513114 transitions. [2021-06-05 16:09:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 16:09:04,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:09:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:04,720 INFO L225 Difference]: With dead ends: 170493 [2021-06-05 16:09:04,720 INFO L226 Difference]: Without dead ends: 169553 [2021-06-05 16:09:04,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8291 ImplicationChecksByTransitivity, 3573.5ms TimeCoverageRelationStatistics Valid=3453, Invalid=17427, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 16:09:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169553 states. [2021-06-05 16:09:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169553 to 74806. [2021-06-05 16:09:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74806 states, 74805 states have (on average 3.0193168905821803) internal successors, (225860), 74805 states have internal predecessors, (225860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74806 states to 74806 states and 225860 transitions. [2021-06-05 16:09:06,722 INFO L78 Accepts]: Start accepts. Automaton has 74806 states and 225860 transitions. Word has length 56 [2021-06-05 16:09:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:06,722 INFO L482 AbstractCegarLoop]: Abstraction has 74806 states and 225860 transitions. [2021-06-05 16:09:06,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 74806 states and 225860 transitions. [2021-06-05 16:09:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:09:06,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:06,829 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:07,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 16:09:07,030 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:07,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:07,031 INFO L82 PathProgramCache]: Analyzing trace with hash 189610307, now seen corresponding path program 30 times [2021-06-05 16:09:07,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:07,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596719107] [2021-06-05 16:09:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 16:09:07,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:07,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596719107] [2021-06-05 16:09:07,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596719107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:07,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374678878] [2021-06-05 16:09:07,287 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 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 16:09:07,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 16:09:07,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:07,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:09:07,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:08,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:08,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:08,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 16:09:08,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:08,070 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:09:08,070 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:09:08,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:08,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:08,077 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 16:09:08,077 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-05 16:09:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 16:09:08,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374678878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:08,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:08,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 16:09:08,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664001452] [2021-06-05 16:09:08,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:09:08,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:08,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:09:08,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:09:08,167 INFO L87 Difference]: Start difference. First operand 74806 states and 225860 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:14,696 INFO L93 Difference]: Finished difference Result 187352 states and 562565 transitions. [2021-06-05 16:09:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-06-05 16:09:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:09:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:14,994 INFO L225 Difference]: With dead ends: 187352 [2021-06-05 16:09:14,994 INFO L226 Difference]: Without dead ends: 186098 [2021-06-05 16:09:14,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10262 ImplicationChecksByTransitivity, 5480.3ms TimeCoverageRelationStatistics Valid=3411, Invalid=22029, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 16:09:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186098 states. [2021-06-05 16:09:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186098 to 91016. [2021-06-05 16:09:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91016 states, 91015 states have (on average 3.040839422073285) internal successors, (276762), 91015 states have internal predecessors, (276762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91016 states to 91016 states and 276762 transitions. [2021-06-05 16:09:17,692 INFO L78 Accepts]: Start accepts. Automaton has 91016 states and 276762 transitions. Word has length 56 [2021-06-05 16:09:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:17,693 INFO L482 AbstractCegarLoop]: Abstraction has 91016 states and 276762 transitions. [2021-06-05 16:09:17,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 91016 states and 276762 transitions. [2021-06-05 16:09:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:09:17,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:17,840 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:18,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:18,049 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:18,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1734125747, now seen corresponding path program 31 times [2021-06-05 16:09:18,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:18,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898261665] [2021-06-05 16:09:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:09:18,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:18,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898261665] [2021-06-05 16:09:18,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898261665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:18,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243227885] [2021-06-05 16:09:18,439 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 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 16:09:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:18,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 16:09:18,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:18,866 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 16:09:19,075 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 21 treesize of output 13 [2021-06-05 16:09:19,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:19,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:19,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:19,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:35 [2021-06-05 16:09:19,490 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_76], 6=[q1], 10=[v_prenex_75]} [2021-06-05 16:09:19,496 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 21 treesize of output 13 [2021-06-05 16:09:19,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:19,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:19,547 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 21 treesize of output 13 [2021-06-05 16:09:19,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:19,551 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 13 treesize of output 9 [2021-06-05 16:09:19,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:19,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:19,596 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:09:19,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 16:09:19,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:19,639 INFO L628 ElimStorePlain]: treesize reduction 45, result has 57.9 percent of original size [2021-06-05 16:09:19,656 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 16:09:19,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:09:19,659 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:19,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:19,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:09:19,674 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:172, output treesize:25 [2021-06-05 16:09:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:09:19,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243227885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:19,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:19,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 16:09:19,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542232921] [2021-06-05 16:09:19,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:09:19,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:19,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:09:19,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:09:19,787 INFO L87 Difference]: Start difference. First operand 91016 states and 276762 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:21,067 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-06-05 16:09:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:24,000 INFO L93 Difference]: Finished difference Result 133556 states and 405201 transitions. [2021-06-05 16:09:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 16:09:24,000 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:09:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:24,225 INFO L225 Difference]: With dead ends: 133556 [2021-06-05 16:09:24,225 INFO L226 Difference]: Without dead ends: 130250 [2021-06-05 16:09:24,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 3743.1ms TimeCoverageRelationStatistics Valid=1210, Invalid=8102, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 16:09:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130250 states. [2021-06-05 16:09:25,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130250 to 96219. [2021-06-05 16:09:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96219 states, 96218 states have (on average 3.0401899852418466) internal successors, (292521), 96218 states have internal predecessors, (292521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96219 states to 96219 states and 292521 transitions. [2021-06-05 16:09:26,313 INFO L78 Accepts]: Start accepts. Automaton has 96219 states and 292521 transitions. Word has length 56 [2021-06-05 16:09:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:26,314 INFO L482 AbstractCegarLoop]: Abstraction has 96219 states and 292521 transitions. [2021-06-05 16:09:26,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 96219 states and 292521 transitions. [2021-06-05 16:09:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:09:26,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:26,445 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:26,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:26,645 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:26,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:26,646 INFO L82 PathProgramCache]: Analyzing trace with hash -210435843, now seen corresponding path program 32 times [2021-06-05 16:09:26,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:26,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019827920] [2021-06-05 16:09:26,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:09:26,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:26,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019827920] [2021-06-05 16:09:26,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019827920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:26,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629063455] [2021-06-05 16:09:26,886 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 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 16:09:26,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:09:26,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:26,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:09:26,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:27,494 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 21 treesize of output 13 [2021-06-05 16:09:27,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:27,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:27,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:27,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:36 [2021-06-05 16:09:28,052 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_85], 1=[v_prenex_79], 3=[v_prenex_78], 6=[q1, v_prenex_84]} [2021-06-05 16:09:28,057 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 24 treesize of output 18 [2021-06-05 16:09:28,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:28,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:28,124 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 30 treesize of output 18 [2021-06-05 16:09:28,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:28,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:28,196 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:09:28,196 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 34 treesize of output 20 [2021-06-05 16:09:28,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:28,285 INFO L628 ElimStorePlain]: treesize reduction 7, result has 95.2 percent of original size [2021-06-05 16:09:28,290 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:09:28,290 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 16:09:28,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:28,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:28,332 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-06-05 16:09:28,332 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 18 [2021-06-05 16:09:28,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:28,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:28,366 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:09:28,367 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 36 treesize of output 18 [2021-06-05 16:09:28,368 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:28,400 INFO L628 ElimStorePlain]: treesize reduction 15, result has 71.2 percent of original size [2021-06-05 16:09:28,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:09:28,401 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:196, output treesize:37 [2021-06-05 16:09:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:09:28,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629063455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:28,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:28,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 16:09:28,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358593627] [2021-06-05 16:09:28,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:09:28,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:28,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:09:28,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:09:28,466 INFO L87 Difference]: Start difference. First operand 96219 states and 292521 transitions. Second operand has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:29,942 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-06-05 16:09:33,534 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 16:09:33,880 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2021-06-05 16:09:35,145 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 16:09:35,273 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-05 16:09:35,593 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 16:09:35,833 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-05 16:09:40,090 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-06-05 16:09:40,803 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-06-05 16:09:40,948 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-05 16:09:42,037 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-05 16:09:42,215 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2021-06-05 16:09:42,389 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2021-06-05 16:09:43,202 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-05 16:09:43,372 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-05 16:09:44,505 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-05 16:09:44,643 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-05 16:09:44,817 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-06-05 16:09:45,311 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-06-05 16:09:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:47,223 INFO L93 Difference]: Finished difference Result 118761 states and 358389 transitions. [2021-06-05 16:09:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2021-06-05 16:09:47,223 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:09:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:47,414 INFO L225 Difference]: With dead ends: 118761 [2021-06-05 16:09:47,414 INFO L226 Difference]: Without dead ends: 116293 [2021-06-05 16:09:47,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28935 ImplicationChecksByTransitivity, 16440.8ms TimeCoverageRelationStatistics Valid=9125, Invalid=57181, Unknown=0, NotChecked=0, Total=66306 [2021-06-05 16:09:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116293 states. [2021-06-05 16:09:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116293 to 96441. [2021-06-05 16:09:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96441 states, 96440 states have (on average 3.04013894649523) internal successors, (293191), 96440 states have internal predecessors, (293191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96441 states to 96441 states and 293191 transitions. [2021-06-05 16:09:49,307 INFO L78 Accepts]: Start accepts. Automaton has 96441 states and 293191 transitions. Word has length 56 [2021-06-05 16:09:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:49,307 INFO L482 AbstractCegarLoop]: Abstraction has 96441 states and 293191 transitions. [2021-06-05 16:09:49,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 96441 states and 293191 transitions. [2021-06-05 16:09:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:09:49,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:49,450 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:49,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 16:09:49,653 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash -150730999, now seen corresponding path program 33 times [2021-06-05 16:09:49,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:49,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317634272] [2021-06-05 16:09:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:09:49,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:49,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317634272] [2021-06-05 16:09:49,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317634272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:49,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080735478] [2021-06-05 16:09:49,976 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 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 16:09:50,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 16:09:50,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:50,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:09:50,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:50,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:50,774 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 13 [2021-06-05 16:09:50,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:50,779 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:09:50,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 16:09:50,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:50,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:50,785 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 16:09:50,785 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-05 16:09:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:09:50,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080735478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:50,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:50,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-05 16:09:50,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602734475] [2021-06-05 16:09:50,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:09:50,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:50,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:09:50,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:09:50,845 INFO L87 Difference]: Start difference. First operand 96441 states and 293191 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:52,767 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-06-05 16:10:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:00,762 INFO L93 Difference]: Finished difference Result 182758 states and 548785 transitions. [2021-06-05 16:10:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-06-05 16:10:00,762 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:10:00,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:01,051 INFO L225 Difference]: With dead ends: 182758 [2021-06-05 16:10:01,051 INFO L226 Difference]: Without dead ends: 182224 [2021-06-05 16:10:01,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18105 ImplicationChecksByTransitivity, 7730.1ms TimeCoverageRelationStatistics Valid=8177, Invalid=34053, Unknown=0, NotChecked=0, Total=42230 [2021-06-05 16:10:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182224 states. [2021-06-05 16:10:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182224 to 87933. [2021-06-05 16:10:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87933 states, 87932 states have (on average 3.0219601510257927) internal successors, (265727), 87932 states have internal predecessors, (265727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87933 states to 87933 states and 265727 transitions. [2021-06-05 16:10:03,433 INFO L78 Accepts]: Start accepts. Automaton has 87933 states and 265727 transitions. Word has length 56 [2021-06-05 16:10:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:03,433 INFO L482 AbstractCegarLoop]: Abstraction has 87933 states and 265727 transitions. [2021-06-05 16:10:03,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 87933 states and 265727 transitions. [2021-06-05 16:10:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:10:03,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:03,581 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:03,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 16:10:03,782 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1534591291, now seen corresponding path program 34 times [2021-06-05 16:10:03,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:03,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823599559] [2021-06-05 16:10:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:03,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:03,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823599559] [2021-06-05 16:10:03,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823599559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:03,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922403165] [2021-06-05 16:10:03,987 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 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 16:10:04,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:10:04,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:04,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:10:04,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:04,549 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-06-05 16:10:04,665 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 21 treesize of output 13 [2021-06-05 16:10:04,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:04,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:10:04,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:10:04,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:38 [2021-06-05 16:10:05,072 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_90], 1=[q3], 6=[q1, v_prenex_88]} [2021-06-05 16:10:05,077 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 17 treesize of output 13 [2021-06-05 16:10:05,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:05,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:10:05,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:05,124 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 25 treesize of output 15 [2021-06-05 16:10:05,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:05,128 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 21 treesize of output 13 [2021-06-05 16:10:05,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:05,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:10:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:05,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:05,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:05,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:05,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:05,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 16:10:05,176 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:05,179 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:10:05,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 16:10:05,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:05,206 INFO L628 ElimStorePlain]: treesize reduction 44, result has 40.5 percent of original size [2021-06-05 16:10:05,206 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-06-05 16:10:05,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:10:05,207 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:167, output treesize:28 [2021-06-05 16:10:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:05,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922403165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:05,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:05,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 16:10:05,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023774947] [2021-06-05 16:10:05,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:10:05,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:05,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:10:05,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:10:05,257 INFO L87 Difference]: Start difference. First operand 87933 states and 265727 transitions. Second operand has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:08,419 INFO L93 Difference]: Finished difference Result 103575 states and 312132 transitions. [2021-06-05 16:10:08,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:10:08,419 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:10:08,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:08,602 INFO L225 Difference]: With dead ends: 103575 [2021-06-05 16:10:08,602 INFO L226 Difference]: Without dead ends: 102231 [2021-06-05 16:10:08,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2192.1ms TimeCoverageRelationStatistics Valid=787, Invalid=3905, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:10:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102231 states. [2021-06-05 16:10:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102231 to 88331. [2021-06-05 16:10:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88331 states, 88330 states have (on average 3.0222461224951886) internal successors, (266955), 88330 states have internal predecessors, (266955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88331 states to 88331 states and 266955 transitions. [2021-06-05 16:10:10,484 INFO L78 Accepts]: Start accepts. Automaton has 88331 states and 266955 transitions. Word has length 56 [2021-06-05 16:10:10,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:10,484 INFO L482 AbstractCegarLoop]: Abstraction has 88331 states and 266955 transitions. [2021-06-05 16:10:10,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:10,484 INFO L276 IsEmpty]: Start isEmpty. Operand 88331 states and 266955 transitions. [2021-06-05 16:10:10,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:10:10,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:10,615 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:10,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:10,817 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash -446962657, now seen corresponding path program 35 times [2021-06-05 16:10:10,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:10,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304236552] [2021-06-05 16:10:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:11,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:11,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304236552] [2021-06-05 16:10:11,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304236552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:11,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071164780] [2021-06-05 16:10:11,165 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 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 16:10:11,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:10:11,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:11,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:10:11,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:11,604 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_92, q3], 1=[v_prenex_94, v_prenex_96], 3=[v_prenex_98]} [2021-06-05 16:10:11,608 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 7 treesize of output 3 [2021-06-05 16:10:11,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:11,710 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 16:10:11,711 INFO L628 ElimStorePlain]: treesize reduction 38, result has 83.3 percent of original size [2021-06-05 16:10:11,711 INFO L518 ElimStorePlain]: Eliminatee q3 vanished before elimination [2021-06-05 16:10:11,717 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:10:11,717 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 13 treesize of output 5 [2021-06-05 16:10:11,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:11,793 INFO L628 ElimStorePlain]: treesize reduction 37, result has 79.1 percent of original size [2021-06-05 16:10:11,794 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-06-05 16:10:11,801 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:10:11,801 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 6 [2021-06-05 16:10:11,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:11,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:10:11,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:10:11,836 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:235, output treesize:124 [2021-06-05 16:10:12,258 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:10:12,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:10:12,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:12,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:10:12,261 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 16:10:12,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:10:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:12,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071164780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:12,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:12,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-05 16:10:12,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87620022] [2021-06-05 16:10:12,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:10:12,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:12,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:10:12,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:10:12,310 INFO L87 Difference]: Start difference. First operand 88331 states and 266955 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:14,705 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 42 [2021-06-05 16:10:19,627 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 16:10:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:21,949 INFO L93 Difference]: Finished difference Result 135112 states and 404915 transitions. [2021-06-05 16:10:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-06-05 16:10:21,949 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:10:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:22,187 INFO L225 Difference]: With dead ends: 135112 [2021-06-05 16:10:22,187 INFO L226 Difference]: Without dead ends: 134978 [2021-06-05 16:10:22,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10563 ImplicationChecksByTransitivity, 7122.8ms TimeCoverageRelationStatistics Valid=4484, Invalid=22576, Unknown=0, NotChecked=0, Total=27060 [2021-06-05 16:10:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134978 states. [2021-06-05 16:10:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134978 to 88414. [2021-06-05 16:10:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88414 states, 88413 states have (on average 3.0223044122470677) internal successors, (267211), 88413 states have internal predecessors, (267211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88414 states to 88414 states and 267211 transitions. [2021-06-05 16:10:24,066 INFO L78 Accepts]: Start accepts. Automaton has 88414 states and 267211 transitions. Word has length 56 [2021-06-05 16:10:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:24,067 INFO L482 AbstractCegarLoop]: Abstraction has 88414 states and 267211 transitions. [2021-06-05 16:10:24,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 88414 states and 267211 transitions. [2021-06-05 16:10:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:10:24,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:24,191 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:24,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 16:10:24,391 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1594296135, now seen corresponding path program 36 times [2021-06-05 16:10:24,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:24,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293250876] [2021-06-05 16:10:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:24,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:24,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293250876] [2021-06-05 16:10:24,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293250876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:24,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589425499] [2021-06-05 16:10:24,703 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 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 16:10:24,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:10:24,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:24,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:10:24,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:25,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:25,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:25,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:25,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-06-05 16:10:25,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:25,459 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:10:25,459 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 16:10:25,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:25,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:10:25,469 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 16:10:25,470 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-05 16:10:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:25,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589425499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:25,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:25,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-05 16:10:25,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300515474] [2021-06-05 16:10:25,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:10:25,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:25,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:10:25,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:10:25,595 INFO L87 Difference]: Start difference. First operand 88414 states and 267211 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:28,090 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 16:10:35,551 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-05 16:10:35,690 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 16:10:39,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:39,919 INFO L93 Difference]: Finished difference Result 210505 states and 628873 transitions. [2021-06-05 16:10:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-06-05 16:10:39,920 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:10:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:40,358 INFO L225 Difference]: With dead ends: 210505 [2021-06-05 16:10:40,358 INFO L226 Difference]: Without dead ends: 210505 [2021-06-05 16:10:40,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26802 ImplicationChecksByTransitivity, 11633.3ms TimeCoverageRelationStatistics Valid=10131, Invalid=51125, Unknown=0, NotChecked=0, Total=61256 [2021-06-05 16:10:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210505 states. [2021-06-05 16:10:42,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210505 to 94167. [2021-06-05 16:10:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94167 states, 94166 states have (on average 3.0259541660471934) internal successors, (284942), 94166 states have internal predecessors, (284942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94167 states to 94167 states and 284942 transitions. [2021-06-05 16:10:43,390 INFO L78 Accepts]: Start accepts. Automaton has 94167 states and 284942 transitions. Word has length 56 [2021-06-05 16:10:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:43,390 INFO L482 AbstractCegarLoop]: Abstraction has 94167 states and 284942 transitions. [2021-06-05 16:10:43,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 94167 states and 284942 transitions. [2021-06-05 16:10:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:10:43,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:43,525 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:43,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:43,727 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:43,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1648612163, now seen corresponding path program 37 times [2021-06-05 16:10:43,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:43,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815978065] [2021-06-05 16:10:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:44,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:44,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815978065] [2021-06-05 16:10:44,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815978065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:44,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267392074] [2021-06-05 16:10:44,053 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 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 16:10:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:44,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:10:44,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:44,212 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 21 treesize of output 13 [2021-06-05 16:10:44,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:44,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:10:44,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:10:44,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:38 [2021-06-05 16:10:44,646 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_102, v_prenex_104, v_prenex_106], 1=[v_prenex_100], 3=[q3]} [2021-06-05 16:10:44,650 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 21 treesize of output 13 [2021-06-05 16:10:44,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:44,772 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 16:10:44,772 INFO L628 ElimStorePlain]: treesize reduction 49, result has 84.0 percent of original size [2021-06-05 16:10:44,773 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-06-05 16:10:44,776 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 9 [2021-06-05 16:10:44,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:44,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:10:44,840 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:10:44,841 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 25 treesize of output 15 [2021-06-05 16:10:44,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:44,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:10:44,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:44,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:44,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:44,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:10:44,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:44,908 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:10:44,908 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 27 treesize of output 15 [2021-06-05 16:10:44,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:44,986 INFO L628 ElimStorePlain]: treesize reduction 26, result has 84.4 percent of original size [2021-06-05 16:10:44,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:10:44,987 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:317, output treesize:137 [2021-06-05 16:10:45,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,069 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 13 [2021-06-05 16:10:45,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:45,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,077 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 20 treesize of output 10 [2021-06-05 16:10:45,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:45,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:10:45,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-06-05 16:10:45,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:45,093 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 16:10:45,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:10:45,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:10:45,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:10:45,116 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 16:10:45,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:48 [2021-06-05 16:10:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:45,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267392074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:45,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:45,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-06-05 16:10:45,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294419513] [2021-06-05 16:10:45,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:10:45,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:10:45,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:10:45,293 INFO L87 Difference]: Start difference. First operand 94167 states and 284942 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:47,782 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 16:10:48,333 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-05 16:10:48,691 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 16:10:49,131 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-06-05 16:10:50,029 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 16:10:50,187 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-05 16:10:50,780 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-06-05 16:10:51,532 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-06-05 16:10:52,111 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-06-05 16:10:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:58,276 INFO L93 Difference]: Finished difference Result 145326 states and 435894 transitions. [2021-06-05 16:10:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-06-05 16:10:58,277 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:10:58,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:58,510 INFO L225 Difference]: With dead ends: 145326 [2021-06-05 16:10:58,510 INFO L226 Difference]: Without dead ends: 144746 [2021-06-05 16:10:58,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16142 ImplicationChecksByTransitivity, 11432.5ms TimeCoverageRelationStatistics Valid=6761, Invalid=30295, Unknown=0, NotChecked=0, Total=37056 [2021-06-05 16:10:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144746 states. [2021-06-05 16:11:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144746 to 94431. [2021-06-05 16:11:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94431 states, 94430 states have (on average 3.0269300010589855) internal successors, (285833), 94430 states have internal predecessors, (285833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94431 states to 94431 states and 285833 transitions. [2021-06-05 16:11:00,877 INFO L78 Accepts]: Start accepts. Automaton has 94431 states and 285833 transitions. Word has length 56 [2021-06-05 16:11:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:00,877 INFO L482 AbstractCegarLoop]: Abstraction has 94431 states and 285833 transitions. [2021-06-05 16:11:00,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 94431 states and 285833 transitions. [2021-06-05 16:11:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:11:01,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:01,064 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:01,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 16:11:01,265 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:01,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1347602821, now seen corresponding path program 38 times [2021-06-05 16:11:01,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:01,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188181698] [2021-06-05 16:11:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:11:02,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:02,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188181698] [2021-06-05 16:11:02,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188181698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:02,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350596665] [2021-06-05 16:11:02,023 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 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 16:11:02,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:11:02,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:11:02,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:11:02,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:02,462 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_112], 1=[v_prenex_108, v_prenex_114], 3=[v_prenex_110]} [2021-06-05 16:11:02,466 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 5 treesize of output 3 [2021-06-05 16:11:02,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:02,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:02,549 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 7 treesize of output 3 [2021-06-05 16:11:02,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:02,650 INFO L628 ElimStorePlain]: treesize reduction 33, result has 85.2 percent of original size [2021-06-05 16:11:02,655 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:11:02,655 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 11 treesize of output 5 [2021-06-05 16:11:02,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:02,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:02,707 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:11:02,708 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 13 treesize of output 5 [2021-06-05 16:11:02,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:02,784 INFO L628 ElimStorePlain]: treesize reduction 26, result has 84.3 percent of original size [2021-06-05 16:11:02,788 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:11:02,788 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 6 [2021-06-05 16:11:02,789 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:02,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:02,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:11:02,824 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:235, output treesize:124 [2021-06-05 16:11:02,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:11:02,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:02,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:11:02,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:02,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:02,925 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 13 [2021-06-05 16:11:02,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:02,930 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:11:02,930 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 16:11:02,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:02,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:02,949 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 16:11:02,949 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:144, output treesize:41 [2021-06-05 16:11:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:11:03,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350596665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:03,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:11:03,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-05 16:11:03,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543169870] [2021-06-05 16:11:03,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:11:03,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:11:03,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:11:03,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:11:03,073 INFO L87 Difference]: Start difference. First operand 94431 states and 285833 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:07,590 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-06-05 16:11:10,833 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-06-05 16:11:11,961 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-05 16:11:14,335 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 16:11:15,105 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-05 16:11:16,071 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 16:11:16,391 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 16:11:17,145 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 16:11:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:11:18,315 INFO L93 Difference]: Finished difference Result 144735 states and 434420 transitions. [2021-06-05 16:11:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-06-05 16:11:18,316 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:11:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:11:18,716 INFO L225 Difference]: With dead ends: 144735 [2021-06-05 16:11:18,717 INFO L226 Difference]: Without dead ends: 144001 [2021-06-05 16:11:18,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17827 ImplicationChecksByTransitivity, 13477.2ms TimeCoverageRelationStatistics Valid=6322, Invalid=37988, Unknown=0, NotChecked=0, Total=44310 [2021-06-05 16:11:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144001 states. [2021-06-05 16:11:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144001 to 94515. [2021-06-05 16:11:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94515 states, 94514 states have (on average 3.02658865353281) internal successors, (286055), 94514 states have internal predecessors, (286055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94515 states to 94515 states and 286055 transitions. [2021-06-05 16:11:20,664 INFO L78 Accepts]: Start accepts. Automaton has 94515 states and 286055 transitions. Word has length 56 [2021-06-05 16:11:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:20,664 INFO L482 AbstractCegarLoop]: Abstraction has 94515 states and 286055 transitions. [2021-06-05 16:11:20,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 94515 states and 286055 transitions. [2021-06-05 16:11:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:11:21,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:21,216 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:21,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:21,429 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:21,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1436448654, now seen corresponding path program 39 times [2021-06-05 16:11:21,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:21,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256362283] [2021-06-05 16:11:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:11:21,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:21,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256362283] [2021-06-05 16:11:21,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256362283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:21,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699671975] [2021-06-05 16:11:21,561 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 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 16:11:21,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:11:21,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:11:21,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:11:21,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:21,743 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:11:21,743 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 22 treesize of output 10 [2021-06-05 16:11:21,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:21,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:21,748 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 16:11:21,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-05 16:11:21,849 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 15 treesize of output 7 [2021-06-05 16:11:21,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:21,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:21,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:11:21,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 16:11:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:11:21,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699671975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:21,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:11:21,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-05 16:11:21,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967111670] [2021-06-05 16:11:21,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:11:21,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:11:21,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:11:21,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:11:21,905 INFO L87 Difference]: Start difference. First operand 94515 states and 286055 transitions. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:11:25,479 INFO L93 Difference]: Finished difference Result 168094 states and 509048 transitions. [2021-06-05 16:11:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 16:11:25,479 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:11:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:11:25,757 INFO L225 Difference]: With dead ends: 168094 [2021-06-05 16:11:25,757 INFO L226 Difference]: Without dead ends: 161191 [2021-06-05 16:11:25,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 1852.8ms TimeCoverageRelationStatistics Valid=1410, Invalid=9932, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 16:11:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161191 states. [2021-06-05 16:11:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161191 to 63031. [2021-06-05 16:11:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63031 states, 63030 states have (on average 3.0277962874821513) internal successors, (190842), 63030 states have internal predecessors, (190842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63031 states to 63031 states and 190842 transitions. [2021-06-05 16:11:27,730 INFO L78 Accepts]: Start accepts. Automaton has 63031 states and 190842 transitions. Word has length 56 [2021-06-05 16:11:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:27,731 INFO L482 AbstractCegarLoop]: Abstraction has 63031 states and 190842 transitions. [2021-06-05 16:11:27,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 63031 states and 190842 transitions. [2021-06-05 16:11:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:11:27,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:27,812 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:28,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:28,034 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:28,034 INFO L82 PathProgramCache]: Analyzing trace with hash 120447938, now seen corresponding path program 40 times [2021-06-05 16:11:28,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:28,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156185] [2021-06-05 16:11:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:11:28,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:28,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156185] [2021-06-05 16:11:28,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:28,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438814795] [2021-06-05 16:11:28,417 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 16:11:28,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:11:28,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:11:28,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:11:28,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:28,580 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 21 treesize of output 13 [2021-06-05 16:11:28,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:28,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:28,591 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 16:11:28,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-05 16:11:28,900 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_116], 10=[q1]} [2021-06-05 16:11:28,903 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 21 treesize of output 13 [2021-06-05 16:11:28,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:28,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:28,934 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 21 treesize of output 13 [2021-06-05 16:11:28,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:28,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:28,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:28,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:28,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:28,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:28,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 16:11:28,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:28,977 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:11:28,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 16:11:28,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:28,996 INFO L628 ElimStorePlain]: treesize reduction 12, result has 65.7 percent of original size [2021-06-05 16:11:28,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:11:28,997 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:119, output treesize:21 [2021-06-05 16:11:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 16:11:29,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438814795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:29,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:11:29,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 29 [2021-06-05 16:11:29,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141711449] [2021-06-05 16:11:29,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:11:29,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:11:29,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:11:29,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:11:29,065 INFO L87 Difference]: Start difference. First operand 63031 states and 190842 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:29,504 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-06-05 16:11:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:11:32,422 INFO L93 Difference]: Finished difference Result 107642 states and 325348 transitions. [2021-06-05 16:11:32,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:11:32,422 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:11:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:11:32,596 INFO L225 Difference]: With dead ends: 107642 [2021-06-05 16:11:32,596 INFO L226 Difference]: Without dead ends: 102118 [2021-06-05 16:11:32,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 2305.3ms TimeCoverageRelationStatistics Valid=1053, Invalid=3503, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:11:32,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102118 states. [2021-06-05 16:11:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102118 to 66355. [2021-06-05 16:11:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66355 states, 66354 states have (on average 3.0275642764565815) internal successors, (200891), 66354 states have internal predecessors, (200891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66355 states to 66355 states and 200891 transitions. [2021-06-05 16:11:33,971 INFO L78 Accepts]: Start accepts. Automaton has 66355 states and 200891 transitions. Word has length 56 [2021-06-05 16:11:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:33,972 INFO L482 AbstractCegarLoop]: Abstraction has 66355 states and 200891 transitions. [2021-06-05 16:11:33,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:33,972 INFO L276 IsEmpty]: Start isEmpty. Operand 66355 states and 200891 transitions. [2021-06-05 16:11:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:11:34,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:34,058 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:34,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:34,261 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2111806327, now seen corresponding path program 41 times [2021-06-05 16:11:34,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:34,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980804202] [2021-06-05 16:11:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:11:34,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:34,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980804202] [2021-06-05 16:11:34,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980804202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:34,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40596097] [2021-06-05 16:11:34,508 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 16:11:34,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:11:34,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:11:34,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 16:11:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:34,714 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:11:34,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:11:34,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:34,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:34,717 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 16:11:34,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-06-05 16:11:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 16:11:34,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40596097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:34,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:11:34,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-06-05 16:11:34,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035430194] [2021-06-05 16:11:34,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:11:34,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:11:34,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:11:34,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:11:34,765 INFO L87 Difference]: Start difference. First operand 66355 states and 200891 transitions. Second operand has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:11:38,593 INFO L93 Difference]: Finished difference Result 94843 states and 285713 transitions. [2021-06-05 16:11:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 16:11:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:11:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:11:38,746 INFO L225 Difference]: With dead ends: 94843 [2021-06-05 16:11:38,746 INFO L226 Difference]: Without dead ends: 93226 [2021-06-05 16:11:38,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 2384.7ms TimeCoverageRelationStatistics Valid=1769, Invalid=7161, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 16:11:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93226 states. [2021-06-05 16:11:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93226 to 68214. [2021-06-05 16:11:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68214 states, 68213 states have (on average 3.0280151877208157) internal successors, (206550), 68213 states have internal predecessors, (206550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68214 states to 68214 states and 206550 transitions. [2021-06-05 16:11:39,989 INFO L78 Accepts]: Start accepts. Automaton has 68214 states and 206550 transitions. Word has length 56 [2021-06-05 16:11:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:39,989 INFO L482 AbstractCegarLoop]: Abstraction has 68214 states and 206550 transitions. [2021-06-05 16:11:39,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 68214 states and 206550 transitions. [2021-06-05 16:11:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:11:40,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:40,079 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:40,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:40,279 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash 130252379, now seen corresponding path program 42 times [2021-06-05 16:11:40,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:40,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674793682] [2021-06-05 16:11:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:11:40,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:40,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674793682] [2021-06-05 16:11:40,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674793682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:40,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203458048] [2021-06-05 16:11:40,803 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 16:11:40,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:11:40,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:11:40,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:11:40,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:41,498 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-06-05 16:11:41,582 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:11:41,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:11:41,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:41,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:41,585 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 16:11:41,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:11:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:11:41,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203458048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:41,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:11:41,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-05 16:11:41,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134787904] [2021-06-05 16:11:41,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:11:41,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:11:41,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:11:41,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:11:41,655 INFO L87 Difference]: Start difference. First operand 68214 states and 206550 transitions. Second operand has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:46,626 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 16:11:51,794 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 16:11:57,814 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 16:11:57,979 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 16:11:58,143 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 16:11:58,715 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 16:11:59,028 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-05 16:11:59,279 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-05 16:11:59,577 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 16:12:01,945 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 16:12:02,381 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-06-05 16:12:03,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:03,904 INFO L93 Difference]: Finished difference Result 134363 states and 399183 transitions. [2021-06-05 16:12:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2021-06-05 16:12:03,904 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:12:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:04,117 INFO L225 Difference]: With dead ends: 134363 [2021-06-05 16:12:04,117 INFO L226 Difference]: Without dead ends: 132419 [2021-06-05 16:12:04,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39310 ImplicationChecksByTransitivity, 18671.9ms TimeCoverageRelationStatistics Valid=9025, Invalid=85531, Unknown=0, NotChecked=0, Total=94556 [2021-06-05 16:12:04,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132419 states. [2021-06-05 16:12:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132419 to 71888. [2021-06-05 16:12:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71888 states, 71887 states have (on average 3.0334831054293545) internal successors, (218068), 71887 states have internal predecessors, (218068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71888 states to 71888 states and 218068 transitions. [2021-06-05 16:12:05,839 INFO L78 Accepts]: Start accepts. Automaton has 71888 states and 218068 transitions. Word has length 56 [2021-06-05 16:12:05,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:05,839 INFO L482 AbstractCegarLoop]: Abstraction has 71888 states and 218068 transitions. [2021-06-05 16:12:05,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:05,839 INFO L276 IsEmpty]: Start isEmpty. Operand 71888 states and 218068 transitions. [2021-06-05 16:12:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:12:05,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:05,931 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:06,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:06,132 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:06,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1860816747, now seen corresponding path program 43 times [2021-06-05 16:12:06,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:06,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682352780] [2021-06-05 16:12:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:06,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:06,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682352780] [2021-06-05 16:12:06,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682352780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:06,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631293747] [2021-06-05 16:12:06,445 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 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 16:12:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:06,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 16:12:06,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:06,610 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 21 treesize of output 13 [2021-06-05 16:12:06,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:06,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:06,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:06,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:38 [2021-06-05 16:12:07,290 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_118, v_prenex_120, v_prenex_122], 1=[q3, v_prenex_124]} [2021-06-05 16:12:07,295 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 21 treesize of output 13 [2021-06-05 16:12:07,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:07,681 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 16:12:07,681 INFO L628 ElimStorePlain]: treesize reduction 60, result has 79.4 percent of original size [2021-06-05 16:12:07,681 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-06-05 16:12:07,685 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 13 treesize of output 9 [2021-06-05 16:12:07,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:07,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:07,743 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:12:07,743 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 27 treesize of output 15 [2021-06-05 16:12:07,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:07,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:07,797 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:12:07,797 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 27 treesize of output 15 [2021-06-05 16:12:07,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:07,869 INFO L628 ElimStorePlain]: treesize reduction 33, result has 80.1 percent of original size [2021-06-05 16:12:07,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:12:07,870 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:302, output treesize:133 [2021-06-05 16:12:07,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:07,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:07,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:07,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:07,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:07,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:07,993 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-06-05 16:12:07,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 24 [2021-06-05 16:12:07,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:07,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:07,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:12:07,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:12:08,002 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 27 treesize of output 13 [2021-06-05 16:12:08,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:08,021 INFO L354 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2021-06-05 16:12:08,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:12:08,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:08,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:08,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:12:08,048 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:157, output treesize:37 [2021-06-05 16:12:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:08,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631293747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:08,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:08,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 16:12:08,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762644245] [2021-06-05 16:12:08,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 16:12:08,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:08,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 16:12:08,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:12:08,153 INFO L87 Difference]: Start difference. First operand 71888 states and 218068 transitions. Second operand has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:10,162 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 16:12:13,104 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 16:12:13,305 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 16:12:13,757 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-06-05 16:12:14,310 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-05 16:12:16,834 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-05 16:12:17,767 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 16:12:17,914 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 16:12:18,186 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 65 [2021-06-05 16:12:18,341 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-06-05 16:12:18,671 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 64 [2021-06-05 16:12:18,844 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-05 16:12:19,151 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 16:12:19,290 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 16:12:19,663 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 16:12:19,803 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 16:12:19,972 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 16:12:20,774 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 16:12:20,915 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 16:12:21,049 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-05 16:12:21,218 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 16:12:21,373 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 16:12:21,545 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 16:12:21,699 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-05 16:12:21,862 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-05 16:12:22,116 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 16:12:22,291 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 16:12:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:22,479 INFO L93 Difference]: Finished difference Result 137760 states and 413530 transitions. [2021-06-05 16:12:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-06-05 16:12:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:12:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:22,836 INFO L225 Difference]: With dead ends: 137760 [2021-06-05 16:12:22,837 INFO L226 Difference]: Without dead ends: 137606 [2021-06-05 16:12:22,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14412 ImplicationChecksByTransitivity, 11152.5ms TimeCoverageRelationStatistics Valid=7257, Invalid=27525, Unknown=0, NotChecked=0, Total=34782 [2021-06-05 16:12:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137606 states. [2021-06-05 16:12:24,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137606 to 76981. [2021-06-05 16:12:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76981 states, 76980 states have (on average 3.0353988048843856) internal successors, (233665), 76980 states have internal predecessors, (233665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76981 states to 76981 states and 233665 transitions. [2021-06-05 16:12:24,528 INFO L78 Accepts]: Start accepts. Automaton has 76981 states and 233665 transitions. Word has length 56 [2021-06-05 16:12:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:24,528 INFO L482 AbstractCegarLoop]: Abstraction has 76981 states and 233665 transitions. [2021-06-05 16:12:24,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 76981 states and 233665 transitions. [2021-06-05 16:12:24,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:12:24,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:24,646 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:24,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:24,846 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:24,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:24,847 INFO L82 PathProgramCache]: Analyzing trace with hash -354012671, now seen corresponding path program 44 times [2021-06-05 16:12:24,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:24,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021990479] [2021-06-05 16:12:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 16:12:25,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:25,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021990479] [2021-06-05 16:12:25,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021990479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:25,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452747727] [2021-06-05 16:12:25,043 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 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 16:12:25,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:12:25,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:25,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:12:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:25,769 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:12:25,824 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 7 treesize of output 3 [2021-06-05 16:12:25,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:25,897 INFO L628 ElimStorePlain]: treesize reduction 38, result has 68.1 percent of original size [2021-06-05 16:12:25,897 INFO L518 ElimStorePlain]: Eliminatee v_prenex_126 vanished before elimination [2021-06-05 16:12:25,898 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 16:12:25,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:126, output treesize:79 [2021-06-05 16:12:26,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:26,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:26,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:26,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:26,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:26,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:26,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:26,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:26,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:12:26,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:26,089 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:12:26,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:12:26,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:26,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:26,103 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 16:12:26,103 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:26 [2021-06-05 16:12:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 16:12:26,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452747727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:26,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:26,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 16:12:26,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62892408] [2021-06-05 16:12:26,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:12:26,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:26,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:12:26,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:12:26,186 INFO L87 Difference]: Start difference. First operand 76981 states and 233665 transitions. Second operand has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:28,687 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 16:12:35,115 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 16:12:35,562 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 16:12:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:39,764 INFO L93 Difference]: Finished difference Result 126205 states and 379875 transitions. [2021-06-05 16:12:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-06-05 16:12:39,764 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:12:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:39,990 INFO L225 Difference]: With dead ends: 126205 [2021-06-05 16:12:39,991 INFO L226 Difference]: Without dead ends: 125231 [2021-06-05 16:12:39,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14100 ImplicationChecksByTransitivity, 11995.6ms TimeCoverageRelationStatistics Valid=3688, Invalid=31844, Unknown=0, NotChecked=0, Total=35532 [2021-06-05 16:12:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125231 states. [2021-06-05 16:12:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125231 to 78489. [2021-06-05 16:12:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78489 states, 78488 states have (on average 3.035113647946183) internal successors, (238220), 78488 states have internal predecessors, (238220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:41,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78489 states to 78489 states and 238220 transitions. [2021-06-05 16:12:41,740 INFO L78 Accepts]: Start accepts. Automaton has 78489 states and 238220 transitions. Word has length 56 [2021-06-05 16:12:41,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:41,740 INFO L482 AbstractCegarLoop]: Abstraction has 78489 states and 238220 transitions. [2021-06-05 16:12:41,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:41,740 INFO L276 IsEmpty]: Start isEmpty. Operand 78489 states and 238220 transitions. [2021-06-05 16:12:41,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:12:41,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:41,844 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:42,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 16:12:42,045 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:42,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2050799049, now seen corresponding path program 45 times [2021-06-05 16:12:42,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:42,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271230509] [2021-06-05 16:12:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 16:12:42,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:42,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271230509] [2021-06-05 16:12:42,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271230509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:42,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828697732] [2021-06-05 16:12:42,267 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 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 16:12:42,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:12:42,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:42,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:12:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:42,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:42,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:42,660 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 13 [2021-06-05 16:12:42,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:42,667 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:12:42,667 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 16:12:42,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:42,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:42,673 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 16:12:42,673 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-05 16:12:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 16:12:42,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828697732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:42,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:42,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 16:12:42,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795065777] [2021-06-05 16:12:42,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:12:42,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:42,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:12:42,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:12:42,768 INFO L87 Difference]: Start difference. First operand 78489 states and 238220 transitions. Second operand has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:43,373 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-06-05 16:12:46,203 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-06-05 16:12:58,142 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 16:12:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:58,454 INFO L93 Difference]: Finished difference Result 150163 states and 450831 transitions. [2021-06-05 16:12:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-05 16:12:58,454 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:12:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:58,708 INFO L225 Difference]: With dead ends: 150163 [2021-06-05 16:12:58,708 INFO L226 Difference]: Without dead ends: 149303 [2021-06-05 16:12:58,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30461 ImplicationChecksByTransitivity, 13034.9ms TimeCoverageRelationStatistics Valid=7924, Invalid=61508, Unknown=0, NotChecked=0, Total=69432 [2021-06-05 16:12:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149303 states. [2021-06-05 16:13:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149303 to 76775. [2021-06-05 16:13:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76775 states, 76774 states have (on average 3.0367572355224426) internal successors, (233144), 76774 states have internal predecessors, (233144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76775 states to 76775 states and 233144 transitions. [2021-06-05 16:13:00,825 INFO L78 Accepts]: Start accepts. Automaton has 76775 states and 233144 transitions. Word has length 56 [2021-06-05 16:13:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:00,825 INFO L482 AbstractCegarLoop]: Abstraction has 76775 states and 233144 transitions. [2021-06-05 16:13:00,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 76775 states and 233144 transitions. [2021-06-05 16:13:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:13:00,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:00,948 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:01,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 16:13:01,148 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:01,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:01,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1706619151, now seen corresponding path program 46 times [2021-06-05 16:13:01,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:01,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087411994] [2021-06-05 16:13:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 16:13:01,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:01,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087411994] [2021-06-05 16:13:01,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087411994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:01,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471527878] [2021-06-05 16:13:01,329 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 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 16:13:01,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:13:01,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:13:01,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:01,486 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 21 treesize of output 13 [2021-06-05 16:13:01,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:01,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:01,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:01,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:33 [2021-06-05 16:13:01,773 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_128], 10=[q1]} [2021-06-05 16:13:01,777 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 21 treesize of output 13 [2021-06-05 16:13:01,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:01,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:01,822 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 13 treesize of output 9 [2021-06-05 16:13:01,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:01,825 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 21 treesize of output 13 [2021-06-05 16:13:01,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:01,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 16:13:01,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:01,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:01,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:13:01,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:01,893 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-06-05 16:13:01,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 18 [2021-06-05 16:13:01,895 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:01,914 INFO L628 ElimStorePlain]: treesize reduction 12, result has 67.6 percent of original size [2021-06-05 16:13:01,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:13:01,915 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:167, output treesize:23 [2021-06-05 16:13:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 16:13:01,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471527878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:01,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:01,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-05 16:13:01,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995606083] [2021-06-05 16:13:01,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:13:01,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:01,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:13:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:13:01,987 INFO L87 Difference]: Start difference. First operand 76775 states and 233144 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:05,255 INFO L93 Difference]: Finished difference Result 187074 states and 565734 transitions. [2021-06-05 16:13:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 16:13:05,256 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:13:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:05,894 INFO L225 Difference]: With dead ends: 187074 [2021-06-05 16:13:05,895 INFO L226 Difference]: Without dead ends: 180481 [2021-06-05 16:13:05,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 2044.0ms TimeCoverageRelationStatistics Valid=962, Invalid=5518, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 16:13:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180481 states. [2021-06-05 16:13:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180481 to 85464. [2021-06-05 16:13:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85464 states, 85463 states have (on average 3.0405087581760526) internal successors, (259851), 85463 states have internal predecessors, (259851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85464 states to 85464 states and 259851 transitions. [2021-06-05 16:13:08,051 INFO L78 Accepts]: Start accepts. Automaton has 85464 states and 259851 transitions. Word has length 56 [2021-06-05 16:13:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:08,051 INFO L482 AbstractCegarLoop]: Abstraction has 85464 states and 259851 transitions. [2021-06-05 16:13:08,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:08,052 INFO L276 IsEmpty]: Start isEmpty. Operand 85464 states and 259851 transitions. [2021-06-05 16:13:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:13:08,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:08,169 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:08,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 16:13:08,370 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:08,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1216084717, now seen corresponding path program 47 times [2021-06-05 16:13:08,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:08,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290836786] [2021-06-05 16:13:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:08,868 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 16:13:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:13:09,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:09,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290836786] [2021-06-05 16:13:09,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290836786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:09,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799923622] [2021-06-05 16:13:09,085 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 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 16:13:09,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:13:09,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:13:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 16:13:09,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799923622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:09,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:09,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 28 [2021-06-05 16:13:09,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607342571] [2021-06-05 16:13:09,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:13:09,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:09,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:13:09,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:13:09,621 INFO L87 Difference]: Start difference. First operand 85464 states and 259851 transitions. Second operand has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:17,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:17,680 INFO L93 Difference]: Finished difference Result 108109 states and 325709 transitions. [2021-06-05 16:13:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 16:13:17,681 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:13:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:17,830 INFO L225 Difference]: With dead ends: 108109 [2021-06-05 16:13:17,830 INFO L226 Difference]: Without dead ends: 107962 [2021-06-05 16:13:17,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4297 ImplicationChecksByTransitivity, 6164.2ms TimeCoverageRelationStatistics Valid=1509, Invalid=12063, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 16:13:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107962 states. [2021-06-05 16:13:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107962 to 85866. [2021-06-05 16:13:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85866 states, 85865 states have (on average 3.0404006288941945) internal successors, (261064), 85865 states have internal predecessors, (261064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85866 states to 85866 states and 261064 transitions. [2021-06-05 16:13:19,330 INFO L78 Accepts]: Start accepts. Automaton has 85866 states and 261064 transitions. Word has length 56 [2021-06-05 16:13:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:19,330 INFO L482 AbstractCegarLoop]: Abstraction has 85866 states and 261064 transitions. [2021-06-05 16:13:19,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 85866 states and 261064 transitions. [2021-06-05 16:13:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:13:19,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:19,451 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:19,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 16:13:19,652 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:19,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:19,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2060786477, now seen corresponding path program 48 times [2021-06-05 16:13:19,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:19,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001126857] [2021-06-05 16:13:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:13:19,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:19,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001126857] [2021-06-05 16:13:19,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001126857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:19,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563067877] [2021-06-05 16:13:19,827 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 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 16:13:19,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:13:19,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:19,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:13:19,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:20,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:20,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:20,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:20,285 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 13 [2021-06-05 16:13:20,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:20,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:20,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:20,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:20,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:20,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:20,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:13:20,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:20,304 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:13:20,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 16:13:20,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:20,316 INFO L628 ElimStorePlain]: treesize reduction 9, result has 59.1 percent of original size [2021-06-05 16:13:20,317 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 16:13:20,317 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:91, output treesize:13 [2021-06-05 16:13:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:13:20,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563067877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:20,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:20,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 16:13:20,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467701388] [2021-06-05 16:13:20,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:13:20,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:20,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:13:20,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:13:20,410 INFO L87 Difference]: Start difference. First operand 85866 states and 261064 transitions. Second operand has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:20,862 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-06-05 16:13:32,752 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 16:13:35,357 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-06-05 16:13:35,504 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 16:13:40,917 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-05 16:13:41,226 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 16:13:42,433 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 16:13:43,551 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 16:13:43,938 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 16:13:48,568 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 16:13:50,431 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-05 16:13:53,660 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-05 16:13:55,843 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 16:13:58,584 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-06-05 16:13:59,843 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 16:14:05,235 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 16:14:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:09,272 INFO L93 Difference]: Finished difference Result 234053 states and 701084 transitions. [2021-06-05 16:14:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 645 states. [2021-06-05 16:14:09,272 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:14:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:09,700 INFO L225 Difference]: With dead ends: 234053 [2021-06-05 16:14:09,700 INFO L226 Difference]: Without dead ends: 232120 [2021-06-05 16:14:09,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 656 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208569 ImplicationChecksByTransitivity, 44249.7ms TimeCoverageRelationStatistics Valid=33140, Invalid=399166, Unknown=0, NotChecked=0, Total=432306 [2021-06-05 16:14:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232120 states. [2021-06-05 16:14:12,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232120 to 82891. [2021-06-05 16:14:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82891 states, 82890 states have (on average 3.0376161177464107) internal successors, (251788), 82890 states have internal predecessors, (251788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82891 states to 82891 states and 251788 transitions. [2021-06-05 16:14:12,321 INFO L78 Accepts]: Start accepts. Automaton has 82891 states and 251788 transitions. Word has length 56 [2021-06-05 16:14:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:12,321 INFO L482 AbstractCegarLoop]: Abstraction has 82891 states and 251788 transitions. [2021-06-05 16:14:12,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 82891 states and 251788 transitions. [2021-06-05 16:14:12,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:14:12,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:12,438 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:12,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:12,638 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:12,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:12,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1445569459, now seen corresponding path program 49 times [2021-06-05 16:14:12,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:12,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850900396] [2021-06-05 16:14:12,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:14:12,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:12,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850900396] [2021-06-05 16:14:12,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850900396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:12,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36591988] [2021-06-05 16:14:12,906 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 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 16:14:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 16:14:13,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:13,637 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:14:13,637 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:14:13,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:13,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:13,640 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 16:14:13,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:14:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:14:13,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36591988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:13,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:13,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 27 [2021-06-05 16:14:13,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540831737] [2021-06-05 16:14:13,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:14:13,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:13,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:14:13,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:14:13,694 INFO L87 Difference]: Start difference. First operand 82891 states and 251788 transitions. Second operand has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:23,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:23,619 INFO L93 Difference]: Finished difference Result 151382 states and 454698 transitions. [2021-06-05 16:14:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 16:14:23,620 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:14:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:23,870 INFO L225 Difference]: With dead ends: 151382 [2021-06-05 16:14:23,870 INFO L226 Difference]: Without dead ends: 150425 [2021-06-05 16:14:23,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13541 ImplicationChecksByTransitivity, 7319.6ms TimeCoverageRelationStatistics Valid=5693, Invalid=27613, Unknown=0, NotChecked=0, Total=33306 [2021-06-05 16:14:24,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150425 states. [2021-06-05 16:14:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150425 to 88356. [2021-06-05 16:14:25,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88356 states, 88355 states have (on average 3.0369645181370606) internal successors, (268331), 88355 states have internal predecessors, (268331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88356 states to 88356 states and 268331 transitions. [2021-06-05 16:14:26,026 INFO L78 Accepts]: Start accepts. Automaton has 88356 states and 268331 transitions. Word has length 56 [2021-06-05 16:14:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:26,026 INFO L482 AbstractCegarLoop]: Abstraction has 88356 states and 268331 transitions. [2021-06-05 16:14:26,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:26,026 INFO L276 IsEmpty]: Start isEmpty. Operand 88356 states and 268331 transitions. [2021-06-05 16:14:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:14:26,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:26,149 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:26,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:26,350 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1007702601, now seen corresponding path program 50 times [2021-06-05 16:14:26,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:26,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433109197] [2021-06-05 16:14:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:14:26,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:26,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433109197] [2021-06-05 16:14:26,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433109197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:26,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339636684] [2021-06-05 16:14:26,636 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 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 16:14:26,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:14:26,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:26,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:14:26,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:27,131 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_131], 1=[v_prenex_129]} [2021-06-05 16:14:27,135 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 9 treesize of output 7 [2021-06-05 16:14:27,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:27,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:27,190 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 7 treesize of output 3 [2021-06-05 16:14:27,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:27,278 INFO L628 ElimStorePlain]: treesize reduction 33, result has 79.0 percent of original size [2021-06-05 16:14:27,284 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:27,284 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 13 treesize of output 7 [2021-06-05 16:14:27,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:27,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:27,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:14:27,324 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:173, output treesize:107 [2021-06-05 16:14:27,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:14:27,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:27,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:27,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:14:27,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:27,446 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:14:27,446 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:14:27,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:27,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:27,467 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 16:14:27,467 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:122, output treesize:38 [2021-06-05 16:14:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:14:27,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339636684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:27,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:27,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 16:14:27,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46202014] [2021-06-05 16:14:27,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:14:27,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:27,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:14:27,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:14:27,993 INFO L87 Difference]: Start difference. First operand 88356 states and 268331 transitions. Second operand has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:32,601 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-05 16:14:34,360 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 16:14:37,092 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-06-05 16:14:38,216 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-05 16:14:38,635 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 16:14:38,820 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 16:14:39,420 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 16:14:39,648 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-06-05 16:14:39,803 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 16:14:39,948 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 16:14:40,206 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 16:14:40,606 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-05 16:14:41,005 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-06-05 16:14:41,251 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-05 16:14:41,571 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 16:14:41,753 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 16:14:42,971 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 16:14:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:43,611 INFO L93 Difference]: Finished difference Result 179810 states and 539423 transitions. [2021-06-05 16:14:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2021-06-05 16:14:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:14:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:43,930 INFO L225 Difference]: With dead ends: 179810 [2021-06-05 16:14:43,931 INFO L226 Difference]: Without dead ends: 177585 [2021-06-05 16:14:43,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22215 ImplicationChecksByTransitivity, 12554.9ms TimeCoverageRelationStatistics Valid=8379, Invalid=41573, Unknown=0, NotChecked=0, Total=49952 [2021-06-05 16:14:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177585 states. [2021-06-05 16:14:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177585 to 89177. [2021-06-05 16:14:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89177 states, 89176 states have (on average 3.035973804611106) internal successors, (270736), 89176 states have internal predecessors, (270736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89177 states to 89177 states and 270736 transitions. [2021-06-05 16:14:46,392 INFO L78 Accepts]: Start accepts. Automaton has 89177 states and 270736 transitions. Word has length 56 [2021-06-05 16:14:46,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:46,392 INFO L482 AbstractCegarLoop]: Abstraction has 89177 states and 270736 transitions. [2021-06-05 16:14:46,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 89177 states and 270736 transitions. [2021-06-05 16:14:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:14:46,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:46,515 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:46,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 16:14:46,717 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash 976675011, now seen corresponding path program 51 times [2021-06-05 16:14:46,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:46,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566766171] [2021-06-05 16:14:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:14:46,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:46,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566766171] [2021-06-05 16:14:46,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566766171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:46,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366331810] [2021-06-05 16:14:46,849 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 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 16:14:46,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:14:46,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:46,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:14:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:47,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:47,370 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 20 treesize of output 10 [2021-06-05 16:14:47,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:47,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:47,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:47,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:14:47,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:47,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:47,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:14:47,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:66, output treesize:13 [2021-06-05 16:14:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:14:47,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366331810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:47,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:47,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 16:14:47,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475803998] [2021-06-05 16:14:47,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:14:47,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:47,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:14:47,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:14:47,440 INFO L87 Difference]: Start difference. First operand 89177 states and 270736 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:48,396 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-05 16:14:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:50,961 INFO L93 Difference]: Finished difference Result 170857 states and 514759 transitions. [2021-06-05 16:14:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:14:50,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:14:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:51,249 INFO L225 Difference]: With dead ends: 170857 [2021-06-05 16:14:51,250 INFO L226 Difference]: Without dead ends: 170857 [2021-06-05 16:14:51,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 2258.0ms TimeCoverageRelationStatistics Valid=835, Invalid=3325, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:14:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170857 states. [2021-06-05 16:14:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170857 to 87664. [2021-06-05 16:14:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87664 states, 87663 states have (on average 3.0358760252329944) internal successors, (266134), 87663 states have internal predecessors, (266134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87664 states to 87664 states and 266134 transitions. [2021-06-05 16:14:53,725 INFO L78 Accepts]: Start accepts. Automaton has 87664 states and 266134 transitions. Word has length 56 [2021-06-05 16:14:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:53,725 INFO L482 AbstractCegarLoop]: Abstraction has 87664 states and 266134 transitions. [2021-06-05 16:14:53,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 87664 states and 266134 transitions. [2021-06-05 16:14:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:14:53,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:53,922 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:54,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 16:14:54,123 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:54,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1653801429, now seen corresponding path program 52 times [2021-06-05 16:14:54,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:54,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917324667] [2021-06-05 16:14:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:14:54,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:54,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917324667] [2021-06-05 16:14:54,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917324667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:54,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336210701] [2021-06-05 16:14:54,468 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 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 16:14:54,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:14:54,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:54,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:14:54,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:54,638 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 21 treesize of output 13 [2021-06-05 16:14:54,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:54,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:54,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:54,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-06-05 16:14:55,193 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_136], 1=[q3], 6=[q1, v_prenex_135]} [2021-06-05 16:14:55,197 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 17 treesize of output 13 [2021-06-05 16:14:55,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:55,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:55,245 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 25 treesize of output 15 [2021-06-05 16:14:55,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:55,249 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 21 treesize of output 13 [2021-06-05 16:14:55,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:55,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:55,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:55,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:55,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:55,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 16:14:55,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:55,296 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:14:55,296 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 36 treesize of output 18 [2021-06-05 16:14:55,297 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:55,322 INFO L628 ElimStorePlain]: treesize reduction 44, result has 40.5 percent of original size [2021-06-05 16:14:55,323 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-06-05 16:14:55,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:14:55,323 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:167, output treesize:28 [2021-06-05 16:14:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:14:55,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336210701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:55,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:55,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2021-06-05 16:14:55,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264240682] [2021-06-05 16:14:55,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 16:14:55,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:55,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 16:14:55,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:14:55,379 INFO L87 Difference]: Start difference. First operand 87664 states and 266134 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:57,512 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 16:14:58,664 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 16:15:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:00,097 INFO L93 Difference]: Finished difference Result 110407 states and 332507 transitions. [2021-06-05 16:15:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 16:15:00,098 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:15:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:00,275 INFO L225 Difference]: With dead ends: 110407 [2021-06-05 16:15:00,275 INFO L226 Difference]: Without dead ends: 106033 [2021-06-05 16:15:00,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2511 ImplicationChecksByTransitivity, 3686.9ms TimeCoverageRelationStatistics Valid=1220, Invalid=6612, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 16:15:00,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106033 states. [2021-06-05 16:15:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106033 to 87561. [2021-06-05 16:15:01,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87561 states, 87560 states have (on average 3.035975331201462) internal successors, (265830), 87560 states have internal predecessors, (265830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87561 states to 87561 states and 265830 transitions. [2021-06-05 16:15:02,017 INFO L78 Accepts]: Start accepts. Automaton has 87561 states and 265830 transitions. Word has length 56 [2021-06-05 16:15:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:02,017 INFO L482 AbstractCegarLoop]: Abstraction has 87561 states and 265830 transitions. [2021-06-05 16:15:02,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 87561 states and 265830 transitions. [2021-06-05 16:15:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:15:02,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:02,152 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:02,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 16:15:02,352 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1999547327, now seen corresponding path program 53 times [2021-06-05 16:15:02,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:02,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916059397] [2021-06-05 16:15:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:15:03,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:03,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916059397] [2021-06-05 16:15:03,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916059397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:03,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715961336] [2021-06-05 16:15:03,173 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 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 16:15:03,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:15:03,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:03,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:15:03,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:03,414 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 17 treesize of output 13 [2021-06-05 16:15:03,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:03,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:03,424 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 16:15:03,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 16:15:03,917 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_141, v_prenex_144], 1=[q3], 3=[q1], 6=[v_prenex_145, v_prenex_139]} [2021-06-05 16:15:03,922 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 17 treesize of output 13 [2021-06-05 16:15:03,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:03,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:03,981 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 21 treesize of output 13 [2021-06-05 16:15:03,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:04,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:04,034 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:15:04,034 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 25 treesize of output 15 [2021-06-05 16:15:04,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:04,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:04,075 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:15:04,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 16:15:04,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:04,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:04,111 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:15:04,111 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 36 treesize of output 18 [2021-06-05 16:15:04,113 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:04,145 INFO L628 ElimStorePlain]: treesize reduction 44, result has 43.6 percent of original size [2021-06-05 16:15:04,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_139 vanished before elimination [2021-06-05 16:15:04,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:15:04,147 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:171, output treesize:32 [2021-06-05 16:15:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:15:04,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715961336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:04,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:04,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 16:15:04,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324388787] [2021-06-05 16:15:04,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:15:04,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:04,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:15:04,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:15:04,210 INFO L87 Difference]: Start difference. First operand 87561 states and 265830 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:06,191 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-05 16:15:06,360 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 16:15:06,534 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 16:15:12,928 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 16:15:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:17,782 INFO L93 Difference]: Finished difference Result 113607 states and 341052 transitions. [2021-06-05 16:15:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-06-05 16:15:17,782 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:15:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:17,967 INFO L225 Difference]: With dead ends: 113607 [2021-06-05 16:15:17,967 INFO L226 Difference]: Without dead ends: 110336 [2021-06-05 16:15:17,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13401 ImplicationChecksByTransitivity, 12213.5ms TimeCoverageRelationStatistics Valid=5692, Invalid=29090, Unknown=0, NotChecked=0, Total=34782 [2021-06-05 16:15:18,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110336 states. [2021-06-05 16:15:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110336 to 88209. [2021-06-05 16:15:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88209 states, 88208 states have (on average 3.0359604571013965) internal successors, (267796), 88208 states have internal predecessors, (267796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88209 states to 88209 states and 267796 transitions. [2021-06-05 16:15:19,916 INFO L78 Accepts]: Start accepts. Automaton has 88209 states and 267796 transitions. Word has length 56 [2021-06-05 16:15:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:19,916 INFO L482 AbstractCegarLoop]: Abstraction has 88209 states and 267796 transitions. [2021-06-05 16:15:19,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 88209 states and 267796 transitions. [2021-06-05 16:15:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:15:20,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:20,051 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:20,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:20,251 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:20,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1303598751, now seen corresponding path program 54 times [2021-06-05 16:15:20,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:20,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398872413] [2021-06-05 16:15:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:15:20,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:20,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398872413] [2021-06-05 16:15:20,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398872413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:20,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885792311] [2021-06-05 16:15:20,940 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 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 16:15:20,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:15:20,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:15:20,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:21,471 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:15:21,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:15:21,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:21,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:21,474 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 16:15:21,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:15:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:15:21,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885792311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:21,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:21,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 34 [2021-06-05 16:15:21,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440004900] [2021-06-05 16:15:21,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:15:21,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:21,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:15:21,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:15:21,527 INFO L87 Difference]: Start difference. First operand 88209 states and 267796 transitions. Second operand has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:24,536 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-06-05 16:15:25,350 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-05 16:15:28,075 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-05 16:15:28,509 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 16:15:33,448 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 16:15:34,600 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-06-05 16:15:34,801 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-06-05 16:15:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:38,072 INFO L93 Difference]: Finished difference Result 175451 states and 525686 transitions. [2021-06-05 16:15:38,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-06-05 16:15:38,072 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:15:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:38,377 INFO L225 Difference]: With dead ends: 175451 [2021-06-05 16:15:38,377 INFO L226 Difference]: Without dead ends: 175273 [2021-06-05 16:15:38,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16017 ImplicationChecksByTransitivity, 11980.0ms TimeCoverageRelationStatistics Valid=4864, Invalid=36956, Unknown=0, NotChecked=0, Total=41820 [2021-06-05 16:15:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175273 states. [2021-06-05 16:15:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175273 to 100237. [2021-06-05 16:15:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100237 states, 100236 states have (on average 3.030657647950836) internal successors, (303781), 100236 states have internal predecessors, (303781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100237 states to 100237 states and 303781 transitions. [2021-06-05 16:15:40,974 INFO L78 Accepts]: Start accepts. Automaton has 100237 states and 303781 transitions. Word has length 56 [2021-06-05 16:15:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:40,975 INFO L482 AbstractCegarLoop]: Abstraction has 100237 states and 303781 transitions. [2021-06-05 16:15:40,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 100237 states and 303781 transitions. [2021-06-05 16:15:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:15:41,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:41,149 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:41,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 16:15:41,349 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:41,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:41,350 INFO L82 PathProgramCache]: Analyzing trace with hash -950109753, now seen corresponding path program 55 times [2021-06-05 16:15:41,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:41,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794643263] [2021-06-05 16:15:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:15:41,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:41,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794643263] [2021-06-05 16:15:41,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794643263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:41,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126062325] [2021-06-05 16:15:41,999 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 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 16:15:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:42,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 16:15:42,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:42,933 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-05 16:15:43,354 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-06-05 16:15:43,524 INFO L446 ElimStorePlain]: Different costs {1=[q3], 3=[q1], 6=[v_prenex_151], 10=[v_prenex_149]} [2021-06-05 16:15:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:43,534 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 23 treesize of output 15 [2021-06-05 16:15:43,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:43,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:43,544 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 36 treesize of output 20 [2021-06-05 16:15:43,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:43,554 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 30 treesize of output 18 [2021-06-05 16:15:43,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:43,563 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 30 treesize of output 18 [2021-06-05 16:15:43,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:43,574 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:15:43,574 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 36 treesize of output 20 [2021-06-05 16:15:43,576 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:43,677 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 16:15:43,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:43,684 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:15:43,685 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2021-06-05 16:15:43,686 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:43,831 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-06-05 16:15:43,831 INFO L628 ElimStorePlain]: treesize reduction 73, result has 78.8 percent of original size [2021-06-05 16:15:43,837 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:15:43,838 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 53 treesize of output 31 [2021-06-05 16:15:43,839 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:43,924 INFO L628 ElimStorePlain]: treesize reduction 77, result has 67.0 percent of original size [2021-06-05 16:15:43,929 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 16:15:43,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 34 [2021-06-05 16:15:43,931 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:43,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:43,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:15:43,960 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:483, output treesize:110 [2021-06-05 16:15:44,251 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:15:44,251 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 31 treesize of output 15 [2021-06-05 16:15:44,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:44,268 INFO L628 ElimStorePlain]: treesize reduction 26, result has 59.4 percent of original size [2021-06-05 16:15:44,268 INFO L518 ElimStorePlain]: Eliminatee v_prenex_153 vanished before elimination [2021-06-05 16:15:44,278 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:15:44,278 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 30 treesize of output 14 [2021-06-05 16:15:44,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:44,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:44,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:15:44,284 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:90, output treesize:10 [2021-06-05 16:15:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:44,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126062325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:44,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:44,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-06-05 16:15:44,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950710344] [2021-06-05 16:15:44,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 16:15:44,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:44,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 16:15:44,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:15:44,328 INFO L87 Difference]: Start difference. First operand 100237 states and 303781 transitions. Second operand has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:46,553 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-06-05 16:15:47,668 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-05 16:15:47,817 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-06-05 16:15:48,221 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 16:15:48,434 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 16:15:48,836 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-06-05 16:15:48,996 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-06-05 16:15:51,054 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 16:15:51,222 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 16:15:51,439 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-05 16:15:51,973 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-06-05 16:15:52,599 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 16:15:52,798 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 16:15:53,103 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 16:15:53,425 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2021-06-05 16:15:53,582 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-05 16:15:53,983 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2021-06-05 16:15:54,737 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2021-06-05 16:15:55,353 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2021-06-05 16:15:56,423 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2021-06-05 16:15:56,616 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-06-05 16:15:56,984 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2021-06-05 16:15:57,504 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 16:15:57,753 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 16:15:57,947 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2021-06-05 16:15:58,466 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 16:15:58,714 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-06-05 16:15:58,954 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2021-06-05 16:15:59,286 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 16:15:59,526 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 16:15:59,723 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2021-06-05 16:15:59,927 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2021-06-05 16:16:00,519 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2021-06-05 16:16:00,942 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-06-05 16:16:01,206 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2021-06-05 16:16:01,387 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-06-05 16:16:01,579 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2021-06-05 16:16:02,321 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 16:16:03,095 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 16:16:03,761 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 16:16:04,064 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 16:16:04,283 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 16:16:04,784 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 16:16:05,028 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 16:16:05,273 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 16:16:05,606 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-06-05 16:16:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:07,950 INFO L93 Difference]: Finished difference Result 195565 states and 584802 transitions. [2021-06-05 16:16:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-06-05 16:16:07,951 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:16:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:08,281 INFO L225 Difference]: With dead ends: 195565 [2021-06-05 16:16:08,282 INFO L226 Difference]: Without dead ends: 194276 [2021-06-05 16:16:08,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29871 ImplicationChecksByTransitivity, 20237.8ms TimeCoverageRelationStatistics Valid=8710, Invalid=59150, Unknown=0, NotChecked=0, Total=67860 [2021-06-05 16:16:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194276 states. [2021-06-05 16:16:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194276 to 100992. [2021-06-05 16:16:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100992 states, 100991 states have (on average 3.030626491469537) internal successors, (306066), 100991 states have internal predecessors, (306066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100992 states to 100992 states and 306066 transitions. [2021-06-05 16:16:11,416 INFO L78 Accepts]: Start accepts. Automaton has 100992 states and 306066 transitions. Word has length 56 [2021-06-05 16:16:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:11,416 INFO L482 AbstractCegarLoop]: Abstraction has 100992 states and 306066 transitions. [2021-06-05 16:16:11,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 100992 states and 306066 transitions. [2021-06-05 16:16:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 16:16:11,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:11,576 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:11,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 16:16:11,776 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:11,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2083983041, now seen corresponding path program 56 times [2021-06-05 16:16:11,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:11,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364388665] [2021-06-05 16:16:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:16:12,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:12,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364388665] [2021-06-05 16:16:12,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364388665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:12,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425489139] [2021-06-05 16:16:12,464 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 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 16:16:12,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:16:12,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:12,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:16:12,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:12,972 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_161], 1=[v_prenex_163, v_prenex_157], 3=[v_prenex_159]} [2021-06-05 16:16:12,978 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 9 treesize of output 7 [2021-06-05 16:16:12,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:13,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:13,055 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 7 treesize of output 3 [2021-06-05 16:16:13,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:13,181 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-06-05 16:16:13,182 INFO L628 ElimStorePlain]: treesize reduction 40, result has 85.3 percent of original size [2021-06-05 16:16:13,187 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:16:13,188 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 13 treesize of output 5 [2021-06-05 16:16:13,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:13,282 INFO L628 ElimStorePlain]: treesize reduction 46, result has 79.1 percent of original size [2021-06-05 16:16:13,283 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-06-05 16:16:13,288 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:16:13,288 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 6 [2021-06-05 16:16:13,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:13,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:13,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:16:13,336 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:289, output treesize:150 [2021-06-05 16:16:13,769 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 16:16:13,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:16:13,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:13,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,802 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 13 [2021-06-05 16:16:13,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:13,807 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:16:13,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:16:13,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:13,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:13,823 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 16:16:13,823 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:122, output treesize:38 [2021-06-05 16:16:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:16:13,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425489139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:13,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:13,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 34 [2021-06-05 16:16:13,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85910896] [2021-06-05 16:16:13,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:16:13,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:13,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:16:13,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:16:13,940 INFO L87 Difference]: Start difference. First operand 100992 states and 306066 transitions. Second operand has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:16,177 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 16:16:17,953 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-05 16:16:18,111 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-05 16:16:18,304 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 16:16:18,447 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 16:16:18,675 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-05 16:16:19,601 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-05 16:16:19,989 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-06-05 16:16:20,227 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-05 16:16:20,976 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 16:16:21,349 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 16:16:21,506 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 16:16:21,712 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2021-06-05 16:16:22,160 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-05 16:16:22,400 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 16:16:22,898 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2021-06-05 16:16:23,203 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 16:16:23,516 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 16:16:24,139 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2021-06-05 16:16:25,202 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2021-06-05 16:16:25,354 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-05 16:16:26,249 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-05 16:16:26,413 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 16:16:26,864 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-05 16:16:27,084 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-06-05 16:16:27,488 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-05 16:16:27,750 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 16:16:28,203 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 16:16:28,932 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-06-05 16:16:30,082 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-06-05 16:16:31,220 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 16:16:32,215 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 16:16:33,477 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 16:16:34,517 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 16:16:34,951 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2021-06-05 16:16:35,142 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 16:16:35,322 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2021-06-05 16:16:35,817 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 16:16:36,398 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-05 16:16:36,562 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-06-05 16:16:36,834 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2021-06-05 16:16:37,217 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2021-06-05 16:16:37,423 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-06-05 16:16:38,113 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-05 16:16:38,627 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-05 16:16:39,310 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 16:16:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:40,040 INFO L93 Difference]: Finished difference Result 153664 states and 460251 transitions. [2021-06-05 16:16:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2021-06-05 16:16:40,041 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 16:16:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:40,272 INFO L225 Difference]: With dead ends: 153664 [2021-06-05 16:16:40,272 INFO L226 Difference]: Without dead ends: 153513 [2021-06-05 16:16:40,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39684 ImplicationChecksByTransitivity, 23955.4ms TimeCoverageRelationStatistics Valid=9396, Invalid=82716, Unknown=0, NotChecked=0, Total=92112 [2021-06-05 16:16:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153513 states. [2021-06-05 16:16:42,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153513 to 101262. [2021-06-05 16:16:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101262 states, 101261 states have (on average 3.0316706333139116) internal successors, (306990), 101261 states have internal predecessors, (306990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101262 states to 101262 states and 306990 transitions. [2021-06-05 16:16:42,644 INFO L78 Accepts]: Start accepts. Automaton has 101262 states and 306990 transitions. Word has length 56 [2021-06-05 16:16:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:42,644 INFO L482 AbstractCegarLoop]: Abstraction has 101262 states and 306990 transitions. [2021-06-05 16:16:42,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 101262 states and 306990 transitions. [2021-06-05 16:16:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 16:16:42,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:42,791 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:42,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:42,992 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:42,992 INFO L82 PathProgramCache]: Analyzing trace with hash 841396681, now seen corresponding path program 57 times [2021-06-05 16:16:42,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:42,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686456636] [2021-06-05 16:16:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 16:16:43,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:43,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686456636] [2021-06-05 16:16:43,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686456636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:43,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627963724] [2021-06-05 16:16:43,205 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 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 16:16:43,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 16:16:43,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:43,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:16:43,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:43,449 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:16:43,449 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:16:43,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:43,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:43,452 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 16:16:43,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:16:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 16:16:43,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627963724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:43,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:43,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 23 [2021-06-05 16:16:43,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188120774] [2021-06-05 16:16:43,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:16:43,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:43,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:16:43,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:16:43,510 INFO L87 Difference]: Start difference. First operand 101262 states and 306990 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:57,994 INFO L93 Difference]: Finished difference Result 280650 states and 841868 transitions. [2021-06-05 16:16:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2021-06-05 16:16:57,995 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 16:16:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:58,514 INFO L225 Difference]: With dead ends: 280650 [2021-06-05 16:16:58,514 INFO L226 Difference]: Without dead ends: 279584 [2021-06-05 16:16:58,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42473 ImplicationChecksByTransitivity, 10741.0ms TimeCoverageRelationStatistics Valid=10285, Invalid=84271, Unknown=0, NotChecked=0, Total=94556 [2021-06-05 16:16:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279584 states. [2021-06-05 16:17:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279584 to 108104. [2021-06-05 16:17:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108104 states, 108103 states have (on average 3.028750358454437) internal successors, (327417), 108103 states have internal predecessors, (327417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108104 states to 108104 states and 327417 transitions. [2021-06-05 16:17:02,183 INFO L78 Accepts]: Start accepts. Automaton has 108104 states and 327417 transitions. Word has length 58 [2021-06-05 16:17:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:02,183 INFO L482 AbstractCegarLoop]: Abstraction has 108104 states and 327417 transitions. [2021-06-05 16:17:02,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 108104 states and 327417 transitions. [2021-06-05 16:17:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 16:17:02,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:02,332 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:02,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:17:02,534 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:02,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1222967297, now seen corresponding path program 58 times [2021-06-05 16:17:02,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:02,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724719717] [2021-06-05 16:17:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 16:17:02,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:02,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724719717] [2021-06-05 16:17:02,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724719717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:02,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112557230] [2021-06-05 16:17:02,613 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 16:17:02,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:17:02,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:17:02,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:17:02,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:02,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:17:02,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:02,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:02,916 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 27 treesize of output 13 [2021-06-05 16:17:02,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:02,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:02,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:02,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:3 [2021-06-05 16:17:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 16:17:02,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112557230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:02,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:02,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 16:17:02,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56838380] [2021-06-05 16:17:02,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:17:02,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:02,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:17:02,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:17:02,951 INFO L87 Difference]: Start difference. First operand 108104 states and 327417 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:04,500 INFO L93 Difference]: Finished difference Result 146539 states and 441815 transitions. [2021-06-05 16:17:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:17:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 16:17:04,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:04,767 INFO L225 Difference]: With dead ends: 146539 [2021-06-05 16:17:04,767 INFO L226 Difference]: Without dead ends: 146539 [2021-06-05 16:17:04,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 446.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:17:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146539 states. [2021-06-05 16:17:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146539 to 107384. [2021-06-05 16:17:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107384 states, 107383 states have (on average 3.028775504502575) internal successors, (325239), 107383 states have internal predecessors, (325239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107384 states to 107384 states and 325239 transitions. [2021-06-05 16:17:07,280 INFO L78 Accepts]: Start accepts. Automaton has 107384 states and 325239 transitions. Word has length 58 [2021-06-05 16:17:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:07,281 INFO L482 AbstractCegarLoop]: Abstraction has 107384 states and 325239 transitions. [2021-06-05 16:17:07,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 107384 states and 325239 transitions. [2021-06-05 16:17:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 16:17:07,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:07,476 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:07,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:17:07,693 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1895291265, now seen corresponding path program 59 times [2021-06-05 16:17:07,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:07,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867677253] [2021-06-05 16:17:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:17:07,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:07,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867677253] [2021-06-05 16:17:07,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867677253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:07,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234989522] [2021-06-05 16:17:07,813 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 16:17:07,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 16:17:07,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:17:07,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 16:17:07,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:08,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:08,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:08,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:08,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:08,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:08,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:17:08,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 16:17:08,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:08,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:08,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:08,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:3 [2021-06-05 16:17:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:17:08,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234989522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:08,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:08,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:17:08,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325474776] [2021-06-05 16:17:08,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:17:08,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:08,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:17:08,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:17:08,162 INFO L87 Difference]: Start difference. First operand 107384 states and 325239 transitions. Second operand has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:09,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:09,721 INFO L93 Difference]: Finished difference Result 163977 states and 495737 transitions. [2021-06-05 16:17:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:17:09,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 16:17:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:10,051 INFO L225 Difference]: With dead ends: 163977 [2021-06-05 16:17:10,051 INFO L226 Difference]: Without dead ends: 163977 [2021-06-05 16:17:10,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 582.5ms TimeCoverageRelationStatistics Valid=425, Invalid=1555, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:17:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163977 states. [2021-06-05 16:17:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163977 to 111759. [2021-06-05 16:17:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111759 states, 111758 states have (on average 3.0281769537751213) internal successors, (338423), 111758 states have internal predecessors, (338423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111759 states to 111759 states and 338423 transitions. [2021-06-05 16:17:12,661 INFO L78 Accepts]: Start accepts. Automaton has 111759 states and 338423 transitions. Word has length 58 [2021-06-05 16:17:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:12,662 INFO L482 AbstractCegarLoop]: Abstraction has 111759 states and 338423 transitions. [2021-06-05 16:17:12,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 111759 states and 338423 transitions. [2021-06-05 16:17:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 16:17:12,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:12,827 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:13,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 16:17:13,028 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:13,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1075319171, now seen corresponding path program 60 times [2021-06-05 16:17:13,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:13,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478041601] [2021-06-05 16:17:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:13,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:13,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478041601] [2021-06-05 16:17:13,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478041601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:13,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614374273] [2021-06-05 16:17:13,773 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 16:17:13,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 16:17:13,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:17:13,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:17:13,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:14,342 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:17:14,343 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:17:14,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:14,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:14,347 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 16:17:14,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:7 [2021-06-05 16:17:14,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:17:14,430 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 11 treesize of output 7 [2021-06-05 16:17:14,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:14,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:14,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:14,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 16:17:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:17:14,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614374273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:14,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:14,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18] total 42 [2021-06-05 16:17:14,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999114339] [2021-06-05 16:17:14,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 16:17:14,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:14,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 16:17:14,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:17:14,479 INFO L87 Difference]: Start difference. First operand 111759 states and 338423 transitions. Second operand has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:15,697 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-06-05 16:17:22,345 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-06-05 16:17:26,936 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-05 16:17:29,322 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 16:17:31,702 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-06-05 16:17:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:34,816 INFO L93 Difference]: Finished difference Result 264126 states and 795381 transitions. [2021-06-05 16:17:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2021-06-05 16:17:34,816 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 16:17:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:35,638 INFO L225 Difference]: With dead ends: 264126 [2021-06-05 16:17:35,639 INFO L226 Difference]: Without dead ends: 263139 [2021-06-05 16:17:35,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53310 ImplicationChecksByTransitivity, 17866.0ms TimeCoverageRelationStatistics Valid=13949, Invalid=101991, Unknown=0, NotChecked=0, Total=115940 [2021-06-05 16:17:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263139 states. [2021-06-05 16:17:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263139 to 121290. [2021-06-05 16:17:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121290 states, 121289 states have (on average 3.028906166264047) internal successors, (367373), 121289 states have internal predecessors, (367373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121290 states to 121290 states and 367373 transitions. [2021-06-05 16:17:38,832 INFO L78 Accepts]: Start accepts. Automaton has 121290 states and 367373 transitions. Word has length 58 [2021-06-05 16:17:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:38,832 INFO L482 AbstractCegarLoop]: Abstraction has 121290 states and 367373 transitions. [2021-06-05 16:17:38,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:38,832 INFO L276 IsEmpty]: Start isEmpty. Operand 121290 states and 367373 transitions. [2021-06-05 16:17:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 16:17:39,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:39,019 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:39,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:17:39,221 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:39,222 INFO L82 PathProgramCache]: Analyzing trace with hash -321303673, now seen corresponding path program 61 times [2021-06-05 16:17:39,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:39,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260532992] [2021-06-05 16:17:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:17:39,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:39,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260532992] [2021-06-05 16:17:39,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260532992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:39,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528069144] [2021-06-05 16:17:39,370 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 16:17:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:39,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 16:17:39,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:39,803 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:17:39,804 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 41 treesize of output 29 [2021-06-05 16:17:39,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:39,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:39,815 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 16:17:39,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:48 [2021-06-05 16:17:40,394 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 16:17:40,607 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-05 16:17:40,779 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 16:17:40,936 INFO L446 ElimStorePlain]: Different costs {1=[q3, v_prenex_171, v_prenex_167], 6=[q1], 10=[v_prenex_170, v_prenex_166]} [2021-06-05 16:17:40,945 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:17:40,945 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 40 treesize of output 24 [2021-06-05 16:17:40,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:41,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:41,022 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 40 treesize of output 24 [2021-06-05 16:17:41,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:41,029 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:17:41,029 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 34 treesize of output 22 [2021-06-05 16:17:41,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:41,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:41,096 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:17:41,096 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 34 treesize of output 22 [2021-06-05 16:17:41,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:41,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:41,160 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:17:41,160 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 21 [2021-06-05 16:17:41,162 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:41,233 INFO L628 ElimStorePlain]: treesize reduction 51, result has 70.7 percent of original size [2021-06-05 16:17:41,238 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 16:17:41,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 21 [2021-06-05 16:17:41,240 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:41,268 INFO L628 ElimStorePlain]: treesize reduction 51, result has 40.7 percent of original size [2021-06-05 16:17:41,268 INFO L518 ElimStorePlain]: Eliminatee v_prenex_166 vanished before elimination [2021-06-05 16:17:41,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:17:41,269 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:305, output treesize:31 [2021-06-05 16:17:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:17:41,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528069144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:41,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:41,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 32 [2021-06-05 16:17:41,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770187820] [2021-06-05 16:17:41,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:17:41,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:41,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:17:41,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:17:41,367 INFO L87 Difference]: Start difference. First operand 121290 states and 367373 transitions. Second operand has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:43,390 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 16:17:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:48,123 INFO L93 Difference]: Finished difference Result 211726 states and 639910 transitions. [2021-06-05 16:17:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-06-05 16:17:48,124 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 16:17:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:48,495 INFO L225 Difference]: With dead ends: 211726 [2021-06-05 16:17:48,495 INFO L226 Difference]: Without dead ends: 207952 [2021-06-05 16:17:48,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6137 ImplicationChecksByTransitivity, 4613.8ms TimeCoverageRelationStatistics Valid=2145, Invalid=14625, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 16:17:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207952 states. Received shutdown request... [2021-06-05 16:17:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207952 to 124431. [2021-06-05 16:17:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124431 states, 124430 states have (on average 3.0311339709073373) internal successors, (377164), 124430 states have internal predecessors, (377164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:51,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-06-05 16:17:51,366 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:17:51,368 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:17:51,370 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:17:51,370 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:17:51 BasicIcfg [2021-06-05 16:17:51,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:17:51,371 INFO L168 Benchmark]: Toolchain (without parser) took 707481.51 ms. Allocated memory was 350.2 MB in the beginning and 15.6 GB in the end (delta: 15.2 GB). Free memory was 328.6 MB in the beginning and 9.3 GB in the end (delta: -9.0 GB). Peak memory consumption was 6.4 GB. Max. memory is 16.0 GB. [2021-06-05 16:17:51,371 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 350.2 MB. Free memory is still 329.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:17:51,371 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.17 ms. Allocated memory is still 350.2 MB. Free memory was 328.6 MB in the beginning and 327.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:17:51,371 INFO L168 Benchmark]: Boogie Preprocessor took 26.48 ms. Allocated memory is still 350.2 MB. Free memory was 327.1 MB in the beginning and 326.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:17:51,371 INFO L168 Benchmark]: RCFGBuilder took 357.04 ms. Allocated memory is still 350.2 MB. Free memory was 326.0 MB in the beginning and 332.4 MB in the end (delta: -6.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-06-05 16:17:51,371 INFO L168 Benchmark]: TraceAbstraction took 707066.75 ms. Allocated memory was 350.2 MB in the beginning and 15.6 GB in the end (delta: 15.2 GB). Free memory was 332.4 MB in the beginning and 9.3 GB in the end (delta: -9.0 GB). Peak memory consumption was 6.4 GB. Max. memory is 16.0 GB. [2021-06-05 16:17:51,371 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 0.13 ms. Allocated memory is still 350.2 MB. Free memory is still 329.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.17 ms. Allocated memory is still 350.2 MB. Free memory was 328.6 MB in the beginning and 327.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 26.48 ms. Allocated memory is still 350.2 MB. Free memory was 327.1 MB in the beginning and 326.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 357.04 ms. Allocated memory is still 350.2 MB. Free memory was 326.0 MB in the beginning and 332.4 MB in the end (delta: -6.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 707066.75 ms. Allocated memory was 350.2 MB in the beginning and 15.6 GB in the end (delta: 15.2 GB). Free memory was 332.4 MB in the beginning and 9.3 GB in the end (delta: -9.0 GB). Peak memory consumption was 6.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 706992.2ms, OverallIterations: 64, TraceHistogramMax: 6, EmptinessCheckTime: 5752.2ms, AutomataDifference: 535224.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 85.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9536 SDtfs, 51882 SDslu, 132116 SDs, 0 SdLazy, 173688 SolverSat, 13172 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 83073.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11545 GetRequests, 2517 SyntacticMatches, 12 SemanticMatches, 9016 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869340 ImplicationChecksByTransitivity, 430364.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=121290occurred in iteration=63, InterpolantAutomatonStates: 8303, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 89542.9ms AutomataMinimizationTime, 64 MinimizatonAttempts, 2591961 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1139.8ms SsaConstructionTime, 2422.5ms SatisfiabilityAnalysisTime, 58690.0ms InterpolantComputationTime, 6367 NumberOfCodeBlocks, 6367 NumberOfCodeBlocksAsserted, 293 NumberOfCheckSat, 6243 ConstructedInterpolants, 54 QuantifiedInterpolants, 109691 SizeOfPredicates, 589 NumberOfNonLiveVariables, 8102 ConjunctsInSsa, 1385 ConjunctsInUnsatCore, 124 InterpolantComputations, 4 PerfectInterpolantSequences, 1090/6210 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