/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/counter-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:00:09,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:00:09,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:00:09,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:00:09,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 16:00:09,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 16:00:09,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 16:00:09,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 16:00:09,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 16:00:09,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 16:00:09,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 16:00:09,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 16:00:09,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 16:00:09,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 16:00:09,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 16:00:09,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 16:00:09,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 16:00:09,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:00:09,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:00:09,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:00:09,330 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 16:00:09,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:00:09,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:00:09,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:00:09,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:00:09,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:00:09,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:00:09,368 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:00:09,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:00:09,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:00:09,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:00:09,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:00:09,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:00:09,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:00:09,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:00:09,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:00:09,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:00:09,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:00:09,371 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:00:09,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:00:09,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:00:09,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:00:09,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:00:09,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:00:09,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:00:09,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:00:09,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:00:09,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:00:09,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:00:09,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:00:09,372 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:00:09,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:00:09,372 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:00:09,373 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:00:09,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:00:09,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:00:09,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:00:09,737 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:00:09,739 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:00:09,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl [2021-06-05 16:00:09,740 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2021-06-05 16:00:09,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:00:09,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:00:09,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:00:09,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:00:09,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:00:09,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:00:09" (1/1) ... [2021-06-05 16:00:09,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:00:09" (1/1) ... [2021-06-05 16:00:09,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:00:09,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:00:09,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:00:09,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:00:09,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:00:09" (1/1) ... [2021-06-05 16:00:09,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:00:09" (1/1) ... [2021-06-05 16:00:09,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:00:09" (1/1) ... [2021-06-05 16:00:09,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:00:09" (1/1) ... [2021-06-05 16:00:09,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:00:09" (1/1) ... [2021-06-05 16:00:09,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:00:09" (1/1) ... [2021-06-05 16:00:09,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:00:09" (1/1) ... [2021-06-05 16:00:09,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:00:09,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:00:09,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:00:09,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:00:09,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:00:09" (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 16:00:09,905 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:00:09,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:00:09,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:00:09,905 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:00:09,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:00:09,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:00:09,906 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:00:09,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:00:09,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:00:09,907 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 16:00:10,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:00:10,070 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:00:10,072 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:00:10 BoogieIcfgContainer [2021-06-05 16:00:10,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:00:10,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:00:10,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:00:10,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:00:10,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:00:09" (1/2) ... [2021-06-05 16:00:10,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b51cb69 and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:00:10, skipping insertion in model container [2021-06-05 16:00:10,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:00:10" (2/2) ... [2021-06-05 16:00:10,090 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2021-06-05 16:00:10,095 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:00:10,095 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:00:10,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:00:10,096 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:00:10,139 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 16:00:10,162 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 16:00:10,182 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:00:10,182 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:00:10,187 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:00:10,187 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:00:10,187 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:00:10,187 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:00:10,187 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:00:10,187 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:00:10,197 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-06-05 16:00:10,206 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:10,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:10,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 16:00:10,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:10,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:10,215 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:10,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1635099045, now seen corresponding path program 1 times [2021-06-05 16:00:10,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:10,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248851990] [2021-06-05 16:00:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:10,394 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 16:00:10,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:10,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248851990] [2021-06-05 16:00:10,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248851990] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:00:10,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:00:10,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:00:10,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055375717] [2021-06-05 16:00:10,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:00:10,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:10,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:00:10,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:00:10,419 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:10,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:10,450 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2021-06-05 16:00:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:00:10,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 16:00:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:10,460 INFO L225 Difference]: With dead ends: 57 [2021-06-05 16:00:10,460 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 16:00:10,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:00:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 16:00:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-06-05 16:00:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2021-06-05 16:00:10,502 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2021-06-05 16:00:10,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:10,503 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2021-06-05 16:00:10,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2021-06-05 16:00:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 16:00:10,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:10,505 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:10,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:00:10,506 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:10,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:10,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2119693475, now seen corresponding path program 1 times [2021-06-05 16:00:10,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:10,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824584121] [2021-06-05 16:00:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:10,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:10,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824584121] [2021-06-05 16:00:10,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824584121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:10,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026880206] [2021-06-05 16:00:10,657 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 16:00:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:10,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:00:10,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:10,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026880206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:10,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:10,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 16:00:10,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791930302] [2021-06-05 16:00:10,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:00:10,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:00:10,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:00:10,910 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:11,077 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-06-05 16:00:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:00:11,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 16:00:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:11,079 INFO L225 Difference]: With dead ends: 68 [2021-06-05 16:00:11,079 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 16:00:11,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:00:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 16:00:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-06-05 16:00:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-06-05 16:00:11,085 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2021-06-05 16:00:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:11,086 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-06-05 16:00:11,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-06-05 16:00:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 16:00:11,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:11,087 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:11,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 16:00:11,301 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash 831812391, now seen corresponding path program 1 times [2021-06-05 16:00:11,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:11,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592977676] [2021-06-05 16:00:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:11,364 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 16:00:11,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:11,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592977676] [2021-06-05 16:00:11,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592977676] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:00:11,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:00:11,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:00:11,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598415656] [2021-06-05 16:00:11,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:00:11,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:11,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:00:11,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:00:11,372 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 16:00:11,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:11,465 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2021-06-05 16:00:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:00:11,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 16:00:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:11,467 INFO L225 Difference]: With dead ends: 71 [2021-06-05 16:00:11,467 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 16:00:11,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:00:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 16:00:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2021-06-05 16:00:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 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 16:00:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2021-06-05 16:00:11,473 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2021-06-05 16:00:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:11,473 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2021-06-05 16:00:11,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 16:00:11,473 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2021-06-05 16:00:11,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 16:00:11,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:11,474 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:11,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:00:11,474 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:11,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1002480409, now seen corresponding path program 2 times [2021-06-05 16:00:11,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:11,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292067123] [2021-06-05 16:00:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:11,516 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 16:00:11,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:11,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292067123] [2021-06-05 16:00:11,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292067123] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:00:11,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:00:11,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:00:11,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038748526] [2021-06-05 16:00:11,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:00:11,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:11,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:00:11,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:00:11,519 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 16:00:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:11,572 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2021-06-05 16:00:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:00:11,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 16:00:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:11,573 INFO L225 Difference]: With dead ends: 51 [2021-06-05 16:00:11,573 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 16:00:11,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:00:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 16:00:11,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-06-05 16:00:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2021-06-05 16:00:11,579 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2021-06-05 16:00:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:11,580 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2021-06-05 16:00:11,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 16:00:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2021-06-05 16:00:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 16:00:11,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:11,581 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:11,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 16:00:11,581 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:11,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1334159197, now seen corresponding path program 2 times [2021-06-05 16:00:11,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:11,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357957583] [2021-06-05 16:00:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:11,615 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 16:00:11,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:11,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357957583] [2021-06-05 16:00:11,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357957583] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:00:11,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:00:11,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:00:11,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107881766] [2021-06-05 16:00:11,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:00:11,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:11,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:00:11,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:00:11,618 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 16:00:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:11,693 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-06-05 16:00:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:00:11,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 16:00:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:11,694 INFO L225 Difference]: With dead ends: 51 [2021-06-05 16:00:11,694 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 16:00:11,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:00:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 16:00:11,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-06-05 16:00:11,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:11,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-06-05 16:00:11,699 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-06-05 16:00:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:11,699 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-06-05 16:00:11,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 16:00:11,700 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-06-05 16:00:11,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:00:11,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:11,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:11,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 16:00:11,701 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1624375643, now seen corresponding path program 1 times [2021-06-05 16:00:11,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:11,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983930929] [2021-06-05 16:00:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:11,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:11,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983930929] [2021-06-05 16:00:11,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983930929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:11,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619104265] [2021-06-05 16:00:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 16:00:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:11,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:00:11,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:12,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:12,235 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 19 treesize of output 7 [2021-06-05 16:00:12,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:12,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:12,245 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 16:00:12,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-06-05 16:00:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:12,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619104265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:12,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:12,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:00:12,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484514917] [2021-06-05 16:00:12,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:00:12,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:12,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:00:12,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:00:12,267 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 16:00:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:12,355 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-05 16:00:12,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:00:12,355 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 18 [2021-06-05 16:00:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:12,357 INFO L225 Difference]: With dead ends: 86 [2021-06-05 16:00:12,357 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 16:00:12,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:00:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 16:00:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-06-05 16:00:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-06-05 16:00:12,376 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2021-06-05 16:00:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:12,376 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-06-05 16:00:12,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 16:00:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-06-05 16:00:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:00:12,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:12,377 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:12,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:12,604 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:12,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1933122355, now seen corresponding path program 2 times [2021-06-05 16:00:12,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:12,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179261505] [2021-06-05 16:00:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:12,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:12,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179261505] [2021-06-05 16:00:12,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179261505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:12,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477035303] [2021-06-05 16:00:12,717 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 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 16:00:12,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:12,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:12,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:00:12,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:12,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:12,813 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 19 treesize of output 7 [2021-06-05 16:00:12,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:12,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:12,822 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 16:00:12,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-06-05 16:00:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:12,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477035303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:12,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:12,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:00:12,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619539601] [2021-06-05 16:00:12,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:00:12,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:12,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:00:12,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:00:12,847 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 16:00:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:12,892 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2021-06-05 16:00:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:00:12,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 18 [2021-06-05 16:00:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:12,893 INFO L225 Difference]: With dead ends: 94 [2021-06-05 16:00:12,893 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 16:00:12,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:00:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 16:00:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-06-05 16:00:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-06-05 16:00:12,897 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2021-06-05 16:00:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:12,898 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-06-05 16:00:12,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 16:00:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-06-05 16:00:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:00:12,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:12,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:13,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:13,112 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:13,113 INFO L82 PathProgramCache]: Analyzing trace with hash 210936483, now seen corresponding path program 3 times [2021-06-05 16:00:13,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:13,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111229975] [2021-06-05 16:00:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:13,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:13,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111229975] [2021-06-05 16:00:13,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111229975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:13,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318722228] [2021-06-05 16:00:13,192 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 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 16:00:13,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:00:13,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:00:13,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:13,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318722228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:13,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:13,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 16:00:13,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725846666] [2021-06-05 16:00:13,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:00:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:00:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:00:13,386 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:13,715 INFO L93 Difference]: Finished difference Result 176 states and 326 transitions. [2021-06-05 16:00:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:00:13,716 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:00:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:13,717 INFO L225 Difference]: With dead ends: 176 [2021-06-05 16:00:13,718 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 16:00:13,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:00:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 16:00:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 73. [2021-06-05 16:00:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 72 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2021-06-05 16:00:13,737 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2021-06-05 16:00:13,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:13,737 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2021-06-05 16:00:13,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:13,737 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2021-06-05 16:00:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:00:13,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:13,739 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:13,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:13,965 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:13,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash -492203993, now seen corresponding path program 4 times [2021-06-05 16:00:13,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:13,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357898861] [2021-06-05 16:00:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:14,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:14,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357898861] [2021-06-05 16:00:14,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357898861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:14,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285431819] [2021-06-05 16:00:14,033 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 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 16:00:14,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:14,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:14,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:00:14,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:14,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285431819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:14,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:14,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:00:14,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300157042] [2021-06-05 16:00:14,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:00:14,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:14,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:00:14,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:00:14,187 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:14,513 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2021-06-05 16:00:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:00:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:00:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:14,515 INFO L225 Difference]: With dead ends: 219 [2021-06-05 16:00:14,515 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 16:00:14,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:00:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 16:00:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2021-06-05 16:00:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-06-05 16:00:14,529 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2021-06-05 16:00:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:14,530 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-06-05 16:00:14,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:14,530 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-06-05 16:00:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:00:14,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:14,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:14,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:14,747 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:14,748 INFO L82 PathProgramCache]: Analyzing trace with hash 97165543, now seen corresponding path program 5 times [2021-06-05 16:00:14,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:14,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052189083] [2021-06-05 16:00:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:14,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:14,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052189083] [2021-06-05 16:00:14,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052189083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:14,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920917756] [2021-06-05 16:00:14,802 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 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 16:00:14,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:00:14,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:14,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:00:14,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:14,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920917756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:14,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:14,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 16:00:14,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437294651] [2021-06-05 16:00:14,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:00:14,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:14,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:00:14,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:00:14,951 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:15,231 INFO L93 Difference]: Finished difference Result 208 states and 404 transitions. [2021-06-05 16:00:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:00:15,231 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:00:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:15,233 INFO L225 Difference]: With dead ends: 208 [2021-06-05 16:00:15,233 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 16:00:15,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:00:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 16:00:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-06-05 16:00:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2051282051282053) internal successors, (258), 117 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2021-06-05 16:00:15,238 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2021-06-05 16:00:15,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:15,238 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2021-06-05 16:00:15,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:15,238 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2021-06-05 16:00:15,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:00:15,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:15,239 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:15,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:15,463 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:15,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:15,463 INFO L82 PathProgramCache]: Analyzing trace with hash -234513245, now seen corresponding path program 6 times [2021-06-05 16:00:15,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:15,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804739721] [2021-06-05 16:00:15,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:15,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:15,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804739721] [2021-06-05 16:00:15,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804739721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:15,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129472804] [2021-06-05 16:00:15,500 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 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 16:00:15,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:00:15,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:15,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:00:15,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:15,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129472804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:15,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:15,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 16:00:15,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655800056] [2021-06-05 16:00:15,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:00:15,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:00:15,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:00:15,638 INFO L87 Difference]: Start difference. First operand 118 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:15,928 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2021-06-05 16:00:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:00:15,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:00:15,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:15,937 INFO L225 Difference]: With dead ends: 205 [2021-06-05 16:00:15,937 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 16:00:15,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:00:15,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 16:00:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2021-06-05 16:00:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-06-05 16:00:15,944 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2021-06-05 16:00:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:15,944 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-06-05 16:00:15,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-06-05 16:00:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:00:15,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:15,945 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:16,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:16,159 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:16,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2122602315, now seen corresponding path program 7 times [2021-06-05 16:00:16,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:16,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387591471] [2021-06-05 16:00:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:00:16,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:16,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387591471] [2021-06-05 16:00:16,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387591471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:16,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18370886] [2021-06-05 16:00:16,223 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 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 16:00:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:16,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:00:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:16,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18370886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:16,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:16,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:00:16,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433289806] [2021-06-05 16:00:16,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:00:16,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:16,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:00:16,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:00:16,362 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:16,642 INFO L93 Difference]: Finished difference Result 300 states and 609 transitions. [2021-06-05 16:00:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:00:16,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:00:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:16,647 INFO L225 Difference]: With dead ends: 300 [2021-06-05 16:00:16,647 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 16:00:16,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 267.2ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:00:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 16:00:16,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 165. [2021-06-05 16:00:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2021-06-05 16:00:16,658 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2021-06-05 16:00:16,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:16,658 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2021-06-05 16:00:16,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2021-06-05 16:00:16,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:00:16,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:16,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:16,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 16:00:16,873 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash -530595531, now seen corresponding path program 8 times [2021-06-05 16:00:16,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:16,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304026803] [2021-06-05 16:00:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:00:16,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:16,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304026803] [2021-06-05 16:00:16,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304026803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:16,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764632652] [2021-06-05 16:00:16,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:16,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:16,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:00:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:17,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764632652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:17,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:17,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 16:00:17,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182044000] [2021-06-05 16:00:17,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:00:17,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:17,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:00:17,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:00:17,068 INFO L87 Difference]: Start difference. First operand 165 states and 376 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:17,272 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-06-05 16:00:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:00:17,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:00:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:17,273 INFO L225 Difference]: With dead ends: 238 [2021-06-05 16:00:17,273 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 16:00:17,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:00:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 16:00:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2021-06-05 16:00:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.340659340659341) internal successors, (426), 182 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2021-06-05 16:00:17,280 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2021-06-05 16:00:17,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:17,280 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2021-06-05 16:00:17,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2021-06-05 16:00:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:00:17,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:17,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:17,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:17,489 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:17,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:17,489 INFO L82 PathProgramCache]: Analyzing trace with hash 420283757, now seen corresponding path program 9 times [2021-06-05 16:00:17,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:17,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480628268] [2021-06-05 16:00:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:00:17,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:17,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480628268] [2021-06-05 16:00:17,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480628268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:17,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659858748] [2021-06-05 16:00:17,536 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 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 16:00:17,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:00:17,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:17,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:00:17,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:17,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659858748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:17,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:17,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 16:00:17,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487704027] [2021-06-05 16:00:17,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:00:17,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:17,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:00:17,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:00:17,701 INFO L87 Difference]: Start difference. First operand 183 states and 426 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:17,950 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2021-06-05 16:00:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:00:17,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:00:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:17,952 INFO L225 Difference]: With dead ends: 302 [2021-06-05 16:00:17,952 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 16:00:17,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:00:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 16:00:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2021-06-05 16:00:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.3351648351648353) internal successors, (425), 182 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2021-06-05 16:00:17,959 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2021-06-05 16:00:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:17,959 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2021-06-05 16:00:17,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:17,959 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2021-06-05 16:00:17,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:00:17,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:17,960 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:18,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:18,161 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:18,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:18,161 INFO L82 PathProgramCache]: Analyzing trace with hash -86062509, now seen corresponding path program 10 times [2021-06-05 16:00:18,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:18,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642563944] [2021-06-05 16:00:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:18,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:18,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642563944] [2021-06-05 16:00:18,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642563944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:18,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412728314] [2021-06-05 16:00:18,205 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 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 16:00:18,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:18,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:18,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:00:18,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:18,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412728314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:18,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:18,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:00:18,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185752467] [2021-06-05 16:00:18,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:00:18,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:18,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:00:18,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:00:18,336 INFO L87 Difference]: Start difference. First operand 183 states and 425 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:18,616 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2021-06-05 16:00:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:00:18,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:00:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:18,618 INFO L225 Difference]: With dead ends: 302 [2021-06-05 16:00:18,618 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 16:00:18,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:00:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 16:00:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-06-05 16:00:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-06-05 16:00:18,624 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2021-06-05 16:00:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:18,625 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-06-05 16:00:18,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-06-05 16:00:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:00:18,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:18,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:18,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 16:00:18,826 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1988809563, now seen corresponding path program 11 times [2021-06-05 16:00:18,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:18,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613294331] [2021-06-05 16:00:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:18,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:18,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613294331] [2021-06-05 16:00:18,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613294331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:18,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301082472] [2021-06-05 16:00:18,936 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 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 16:00:18,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:00:18,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:18,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:00:18,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:19,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:19,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:19,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 16:00:19,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:19,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:19,134 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 16:00:19,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 16:00:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:19,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301082472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:19,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:19,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:00:19,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461440980] [2021-06-05 16:00:19,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:00:19,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:19,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:00:19,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:00:19,153 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:19,282 INFO L93 Difference]: Finished difference Result 282 states and 622 transitions. [2021-06-05 16:00:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:00:19,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:00:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:19,283 INFO L225 Difference]: With dead ends: 282 [2021-06-05 16:00:19,283 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 16:00:19,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:00:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 16:00:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 214. [2021-06-05 16:00:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3427230046948355) internal successors, (499), 213 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:19,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 499 transitions. [2021-06-05 16:00:19,290 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 499 transitions. Word has length 22 [2021-06-05 16:00:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:19,290 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 499 transitions. [2021-06-05 16:00:19,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 499 transitions. [2021-06-05 16:00:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:00:19,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:19,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:19,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 16:00:19,505 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:19,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash 197742959, now seen corresponding path program 12 times [2021-06-05 16:00:19,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:19,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022906026] [2021-06-05 16:00:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:19,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:19,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022906026] [2021-06-05 16:00:19,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022906026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:19,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944117397] [2021-06-05 16:00:19,632 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 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 16:00:19,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:00:19,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:00:19,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:19,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:19,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:19,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:19,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 16:00:19,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:19,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:19,806 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 16:00:19,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 16:00:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:19,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944117397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:19,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:19,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:00:19,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483142480] [2021-06-05 16:00:19,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:00:19,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:00:19,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:00:19,836 INFO L87 Difference]: Start difference. First operand 214 states and 499 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:19,942 INFO L93 Difference]: Finished difference Result 256 states and 583 transitions. [2021-06-05 16:00:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:00:19,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:00:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:19,943 INFO L225 Difference]: With dead ends: 256 [2021-06-05 16:00:19,943 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 16:00:19,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:00:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 16:00:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-06-05 16:00:19,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3529411764705883) internal successors, (520), 221 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 520 transitions. [2021-06-05 16:00:19,949 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 520 transitions. Word has length 22 [2021-06-05 16:00:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:19,949 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 520 transitions. [2021-06-05 16:00:19,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 520 transitions. [2021-06-05 16:00:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:00:19,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:19,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:20,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 16:00:20,165 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1748301367, now seen corresponding path program 13 times [2021-06-05 16:00:20,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:20,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864686626] [2021-06-05 16:00:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:20,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:20,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864686626] [2021-06-05 16:00:20,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864686626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:20,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311392290] [2021-06-05 16:00:20,276 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 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 16:00:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:20,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:00:20,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:20,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:20,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:20,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:20,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:20,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 16:00:20,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:20,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:20,484 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 16:00:20,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 16:00:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:20,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311392290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:20,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:20,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:00:20,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578665796] [2021-06-05 16:00:20,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:00:20,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:20,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:00:20,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:00:20,507 INFO L87 Difference]: Start difference. First operand 222 states and 520 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:20,663 INFO L93 Difference]: Finished difference Result 301 states and 659 transitions. [2021-06-05 16:00:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:00:20,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:00:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:20,665 INFO L225 Difference]: With dead ends: 301 [2021-06-05 16:00:20,666 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 16:00:20,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:00:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 16:00:20,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 227. [2021-06-05 16:00:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.3584070796460175) internal successors, (533), 226 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 533 transitions. [2021-06-05 16:00:20,672 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 533 transitions. Word has length 22 [2021-06-05 16:00:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:20,672 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 533 transitions. [2021-06-05 16:00:20,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 533 transitions. [2021-06-05 16:00:20,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:00:20,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:20,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:20,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:20,889 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash 343984883, now seen corresponding path program 14 times [2021-06-05 16:00:20,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:20,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845193810] [2021-06-05 16:00:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:21,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:21,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845193810] [2021-06-05 16:00:21,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845193810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:21,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461164697] [2021-06-05 16:00:21,006 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 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 16:00:21,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:21,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:21,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:00:21,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:21,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:21,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:21,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:21,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:21,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 16:00:21,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:21,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:21,155 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 16:00:21,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 16:00:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:21,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461164697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:21,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:21,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:00:21,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732153958] [2021-06-05 16:00:21,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:00:21,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:21,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:00:21,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:00:21,176 INFO L87 Difference]: Start difference. First operand 227 states and 533 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:21,307 INFO L93 Difference]: Finished difference Result 320 states and 703 transitions. [2021-06-05 16:00:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:00:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:00:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:21,308 INFO L225 Difference]: With dead ends: 320 [2021-06-05 16:00:21,308 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 16:00:21,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:00:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 16:00:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 246. [2021-06-05 16:00:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.363265306122449) internal successors, (579), 245 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 579 transitions. [2021-06-05 16:00:21,315 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 579 transitions. Word has length 22 [2021-06-05 16:00:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:21,315 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 579 transitions. [2021-06-05 16:00:21,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 579 transitions. [2021-06-05 16:00:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:21,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:21,316 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:21,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:21,517 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:21,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1412718173, now seen corresponding path program 15 times [2021-06-05 16:00:21,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:21,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89579293] [2021-06-05 16:00:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:21,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:21,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89579293] [2021-06-05 16:00:21,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89579293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:21,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535277377] [2021-06-05 16:00:21,597 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 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 16:00:21,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:00:21,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:21,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:21,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:21,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535277377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:21,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:21,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:00:21,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756793713] [2021-06-05 16:00:21,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:00:21,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:21,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:00:21,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:00:21,754 INFO L87 Difference]: Start difference. First operand 246 states and 579 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:22,265 INFO L93 Difference]: Finished difference Result 495 states and 1055 transitions. [2021-06-05 16:00:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:00:22,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:22,270 INFO L225 Difference]: With dead ends: 495 [2021-06-05 16:00:22,270 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 16:00:22,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:00:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 16:00:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 238. [2021-06-05 16:00:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.3628691983122363) internal successors, (560), 237 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 560 transitions. [2021-06-05 16:00:22,279 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 560 transitions. Word has length 24 [2021-06-05 16:00:22,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:22,279 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 560 transitions. [2021-06-05 16:00:22,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:22,279 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 560 transitions. [2021-06-05 16:00:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:22,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:22,280 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:22,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:22,501 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1474117159, now seen corresponding path program 16 times [2021-06-05 16:00:22,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:22,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819959647] [2021-06-05 16:00:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:22,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:22,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819959647] [2021-06-05 16:00:22,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819959647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:22,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855709093] [2021-06-05 16:00:22,557 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 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 16:00:22,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:22,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:22,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855709093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:22,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:22,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 16:00:22,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684939361] [2021-06-05 16:00:22,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:00:22,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:22,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:00:22,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:00:22,711 INFO L87 Difference]: Start difference. First operand 238 states and 560 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 16:00:23,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:23,311 INFO L93 Difference]: Finished difference Result 696 states and 1431 transitions. [2021-06-05 16:00:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:00:23,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:23,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:23,314 INFO L225 Difference]: With dead ends: 696 [2021-06-05 16:00:23,314 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 16:00:23,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:00:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 16:00:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 294. [2021-06-05 16:00:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.378839590443686) internal successors, (697), 293 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 697 transitions. [2021-06-05 16:00:23,325 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 697 transitions. Word has length 24 [2021-06-05 16:00:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:23,325 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 697 transitions. [2021-06-05 16:00:23,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 16:00:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 697 transitions. [2021-06-05 16:00:23,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:23,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:23,326 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:23,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 16:00:23,548 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash -964250137, now seen corresponding path program 17 times [2021-06-05 16:00:23,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:23,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633916017] [2021-06-05 16:00:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:23,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:23,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633916017] [2021-06-05 16:00:23,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633916017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:23,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329407136] [2021-06-05 16:00:23,596 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 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 16:00:23,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:00:23,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:23,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:23,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:23,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329407136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:23,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:23,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 16:00:23,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170693073] [2021-06-05 16:00:23,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:00:23,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:23,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:00:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:00:23,733 INFO L87 Difference]: Start difference. First operand 294 states and 697 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:24,262 INFO L93 Difference]: Finished difference Result 654 states and 1426 transitions. [2021-06-05 16:00:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:00:24,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:24,265 INFO L225 Difference]: With dead ends: 654 [2021-06-05 16:00:24,265 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 16:00:24,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:00:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 16:00:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 362. [2021-06-05 16:00:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4238227146814406) internal successors, (875), 361 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 875 transitions. [2021-06-05 16:00:24,279 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 875 transitions. Word has length 24 [2021-06-05 16:00:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:24,279 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 875 transitions. [2021-06-05 16:00:24,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 875 transitions. [2021-06-05 16:00:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:24,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:24,280 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:24,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 16:00:24,500 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1295928925, now seen corresponding path program 18 times [2021-06-05 16:00:24,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:24,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570062560] [2021-06-05 16:00:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:24,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:24,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570062560] [2021-06-05 16:00:24,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570062560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:24,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848942007] [2021-06-05 16:00:24,548 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 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 16:00:24,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:00:24,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:24,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:24,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:24,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848942007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:24,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:24,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 16:00:24,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416180673] [2021-06-05 16:00:24,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:00:24,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:24,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:00:24,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:00:24,707 INFO L87 Difference]: Start difference. First operand 362 states and 875 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:25,100 INFO L93 Difference]: Finished difference Result 539 states and 1206 transitions. [2021-06-05 16:00:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:00:25,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:25,111 INFO L225 Difference]: With dead ends: 539 [2021-06-05 16:00:25,111 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 16:00:25,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:00:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 16:00:25,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 362. [2021-06-05 16:00:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4210526315789473) internal successors, (874), 361 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 874 transitions. [2021-06-05 16:00:25,120 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 874 transitions. Word has length 24 [2021-06-05 16:00:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:25,120 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 874 transitions. [2021-06-05 16:00:25,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:25,120 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 874 transitions. [2021-06-05 16:00:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:25,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:25,121 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:25,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 16:00:25,345 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:25,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1782884239, now seen corresponding path program 19 times [2021-06-05 16:00:25,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:25,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017992434] [2021-06-05 16:00:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:00:25,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:25,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017992434] [2021-06-05 16:00:25,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017992434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:25,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414259730] [2021-06-05 16:00:25,403 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 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 16:00:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:25,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:25,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414259730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:25,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:25,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 16:00:25,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705559743] [2021-06-05 16:00:25,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:00:25,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:25,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:00:25,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:00:25,554 INFO L87 Difference]: Start difference. First operand 362 states and 874 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:25,915 INFO L93 Difference]: Finished difference Result 593 states and 1318 transitions. [2021-06-05 16:00:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:00:25,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:25,918 INFO L225 Difference]: With dead ends: 593 [2021-06-05 16:00:25,918 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 16:00:25,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:00:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 16:00:25,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 383. [2021-06-05 16:00:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.4424083769633507) internal successors, (933), 382 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:25,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 933 transitions. [2021-06-05 16:00:25,928 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 933 transitions. Word has length 24 [2021-06-05 16:00:25,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:25,929 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 933 transitions. [2021-06-05 16:00:25,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:25,929 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 933 transitions. [2021-06-05 16:00:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:25,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:25,930 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:26,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 16:00:26,149 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:26,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1338351217, now seen corresponding path program 20 times [2021-06-05 16:00:26,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:26,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46661691] [2021-06-05 16:00:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:26,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:26,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46661691] [2021-06-05 16:00:26,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46661691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:26,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17088472] [2021-06-05 16:00:26,214 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 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 16:00:26,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:26,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:26,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:26,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:26,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17088472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:26,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:26,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:00:26,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192923304] [2021-06-05 16:00:26,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:00:26,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:26,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:00:26,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:00:26,376 INFO L87 Difference]: Start difference. First operand 383 states and 933 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:26,825 INFO L93 Difference]: Finished difference Result 701 states and 1556 transitions. [2021-06-05 16:00:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:00:26,829 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:26,831 INFO L225 Difference]: With dead ends: 701 [2021-06-05 16:00:26,831 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 16:00:26,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:00:26,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 16:00:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 386. [2021-06-05 16:00:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.4363636363636365) internal successors, (938), 385 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 938 transitions. [2021-06-05 16:00:26,846 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 938 transitions. Word has length 24 [2021-06-05 16:00:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:26,846 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 938 transitions. [2021-06-05 16:00:26,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 938 transitions. [2021-06-05 16:00:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:26,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:26,848 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:27,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 16:00:27,063 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:27,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1334899385, now seen corresponding path program 21 times [2021-06-05 16:00:27,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:27,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480991270] [2021-06-05 16:00:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:00:27,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:27,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480991270] [2021-06-05 16:00:27,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480991270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:27,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089570235] [2021-06-05 16:00:27,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:27,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:00:27,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:27,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:27,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089570235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:27,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:27,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 16:00:27,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270479535] [2021-06-05 16:00:27,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:00:27,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:27,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:00:27,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:00:27,267 INFO L87 Difference]: Start difference. First operand 386 states and 938 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:27,716 INFO L93 Difference]: Finished difference Result 817 states and 1787 transitions. [2021-06-05 16:00:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:00:27,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:27,727 INFO L225 Difference]: With dead ends: 817 [2021-06-05 16:00:27,727 INFO L226 Difference]: Without dead ends: 817 [2021-06-05 16:00:27,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:00:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-06-05 16:00:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 408. [2021-06-05 16:00:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.407862407862408) internal successors, (980), 407 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 980 transitions. [2021-06-05 16:00:27,738 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 980 transitions. Word has length 24 [2021-06-05 16:00:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:27,738 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 980 transitions. [2021-06-05 16:00:27,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 980 transitions. [2021-06-05 16:00:27,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:27,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:27,740 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:27,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:27,962 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:27,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2049905863, now seen corresponding path program 22 times [2021-06-05 16:00:27,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:27,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859753972] [2021-06-05 16:00:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:00:28,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:28,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859753972] [2021-06-05 16:00:28,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859753972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:28,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963699508] [2021-06-05 16:00:28,015 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 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 16:00:28,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:28,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:28,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:28,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:28,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963699508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:28,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:28,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:00:28,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347653315] [2021-06-05 16:00:28,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:00:28,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:28,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:00:28,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:00:28,171 INFO L87 Difference]: Start difference. First operand 408 states and 980 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:28,628 INFO L93 Difference]: Finished difference Result 578 states and 1266 transitions. [2021-06-05 16:00:28,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:00:28,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:28,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:28,629 INFO L225 Difference]: With dead ends: 578 [2021-06-05 16:00:28,629 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 16:00:28,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 424.7ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:00:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 16:00:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 408. [2021-06-05 16:00:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.398034398034398) internal successors, (976), 407 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 976 transitions. [2021-06-05 16:00:28,637 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 976 transitions. Word has length 24 [2021-06-05 16:00:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:28,637 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 976 transitions. [2021-06-05 16:00:28,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 976 transitions. [2021-06-05 16:00:28,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:28,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:28,638 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:28,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 16:00:28,861 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:28,861 INFO L82 PathProgramCache]: Analyzing trace with hash -275355531, now seen corresponding path program 23 times [2021-06-05 16:00:28,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:28,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302854946] [2021-06-05 16:00:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:00:28,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:28,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302854946] [2021-06-05 16:00:28,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302854946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:28,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055582600] [2021-06-05 16:00:28,917 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 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 16:00:28,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:00:28,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:28,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:29,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055582600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:29,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:29,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:00:29,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269538290] [2021-06-05 16:00:29,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:00:29,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:29,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:00:29,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:00:29,072 INFO L87 Difference]: Start difference. First operand 408 states and 976 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:29,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:29,571 INFO L93 Difference]: Finished difference Result 943 states and 2146 transitions. [2021-06-05 16:00:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:00:29,571 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:29,574 INFO L225 Difference]: With dead ends: 943 [2021-06-05 16:00:29,574 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 16:00:29,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 474.2ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:00:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 16:00:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 633. [2021-06-05 16:00:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.4857594936708862) internal successors, (1571), 632 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1571 transitions. [2021-06-05 16:00:29,588 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1571 transitions. Word has length 24 [2021-06-05 16:00:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:29,588 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1571 transitions. [2021-06-05 16:00:29,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1571 transitions. [2021-06-05 16:00:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:29,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:29,590 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:29,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:29,805 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:29,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:29,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2027436755, now seen corresponding path program 24 times [2021-06-05 16:00:29,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:29,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198138229] [2021-06-05 16:00:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:00:29,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:29,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198138229] [2021-06-05 16:00:29,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198138229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:29,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539356344] [2021-06-05 16:00:29,850 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 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 16:00:29,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:00:29,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:29,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:29,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:30,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539356344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:30,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:30,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 16:00:30,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508340961] [2021-06-05 16:00:30,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:00:30,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:30,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:00:30,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:00:30,021 INFO L87 Difference]: Start difference. First operand 633 states and 1571 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:30,367 INFO L93 Difference]: Finished difference Result 910 states and 2079 transitions. [2021-06-05 16:00:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:00:30,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:30,370 INFO L225 Difference]: With dead ends: 910 [2021-06-05 16:00:30,370 INFO L226 Difference]: Without dead ends: 906 [2021-06-05 16:00:30,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:00:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-06-05 16:00:30,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 633. [2021-06-05 16:00:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.481012658227848) internal successors, (1568), 632 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1568 transitions. [2021-06-05 16:00:30,383 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1568 transitions. Word has length 24 [2021-06-05 16:00:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:30,383 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1568 transitions. [2021-06-05 16:00:30,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:30,383 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1568 transitions. [2021-06-05 16:00:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:30,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:30,384 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:30,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 16:00:30,607 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:30,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:30,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1761184275, now seen corresponding path program 25 times [2021-06-05 16:00:30,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:30,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955327109] [2021-06-05 16:00:30,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:00:30,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:30,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955327109] [2021-06-05 16:00:30,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955327109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:30,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275938695] [2021-06-05 16:00:30,673 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 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 16:00:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:30,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:30,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275938695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:30,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:30,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:00:30,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006346029] [2021-06-05 16:00:30,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:00:30,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:30,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:00:30,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:00:30,813 INFO L87 Difference]: Start difference. First operand 633 states and 1568 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:31,204 INFO L93 Difference]: Finished difference Result 997 states and 2276 transitions. [2021-06-05 16:00:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:00:31,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:31,207 INFO L225 Difference]: With dead ends: 997 [2021-06-05 16:00:31,207 INFO L226 Difference]: Without dead ends: 985 [2021-06-05 16:00:31,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:00:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-05 16:00:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 684. [2021-06-05 16:00:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4963396778916547) internal successors, (1705), 683 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1705 transitions. [2021-06-05 16:00:31,219 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1705 transitions. Word has length 24 [2021-06-05 16:00:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:31,219 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1705 transitions. [2021-06-05 16:00:31,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1705 transitions. [2021-06-05 16:00:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:00:31,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:31,221 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:31,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:31,422 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1533962895, now seen corresponding path program 26 times [2021-06-05 16:00:31,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:31,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286259121] [2021-06-05 16:00:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:31,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:31,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286259121] [2021-06-05 16:00:31,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286259121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:31,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57144643] [2021-06-05 16:00:31,473 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 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 16:00:31,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:31,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:31,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:00:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:31,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57144643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:31,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:31,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 16:00:31,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846947890] [2021-06-05 16:00:31,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:00:31,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:31,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:00:31,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:00:31,628 INFO L87 Difference]: Start difference. First operand 684 states and 1705 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:32,095 INFO L93 Difference]: Finished difference Result 1028 states and 2383 transitions. [2021-06-05 16:00:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:00:32,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:00:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:32,099 INFO L225 Difference]: With dead ends: 1028 [2021-06-05 16:00:32,099 INFO L226 Difference]: Without dead ends: 1008 [2021-06-05 16:00:32,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:00:32,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-05 16:00:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 740. [2021-06-05 16:00:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.5087956698240865) internal successors, (1854), 739 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1854 transitions. [2021-06-05 16:00:32,112 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1854 transitions. Word has length 24 [2021-06-05 16:00:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:32,112 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1854 transitions. [2021-06-05 16:00:32,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1854 transitions. [2021-06-05 16:00:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:32,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:32,114 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:32,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 16:00:32,336 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1047161765, now seen corresponding path program 27 times [2021-06-05 16:00:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:32,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137281970] [2021-06-05 16:00:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:32,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:32,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137281970] [2021-06-05 16:00:32,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137281970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:32,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306357588] [2021-06-05 16:00:32,643 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 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 16:00:32,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:00:32,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:32,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:00:32,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:33,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:33,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:33,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:33,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-06-05 16:00:33,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:00:33,282 INFO L628 ElimStorePlain]: treesize reduction 52, result has 40.2 percent of original size [2021-06-05 16:00:33,290 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 16:00:33,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:22 [2021-06-05 16:00:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:33,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306357588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:33,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:33,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-05 16:00:33,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828305717] [2021-06-05 16:00:33,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:00:33,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:33,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:00:33,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:00:33,363 INFO L87 Difference]: Start difference. First operand 740 states and 1854 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:34,602 INFO L93 Difference]: Finished difference Result 1044 states and 2520 transitions. [2021-06-05 16:00:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:00:34,603 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:34,605 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 16:00:34,605 INFO L226 Difference]: Without dead ends: 1030 [2021-06-05 16:00:34,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1293.8ms TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:00:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-05 16:00:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 756. [2021-06-05 16:00:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.508609271523179) internal successors, (1894), 755 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1894 transitions. [2021-06-05 16:00:34,619 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1894 transitions. Word has length 26 [2021-06-05 16:00:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:34,619 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1894 transitions. [2021-06-05 16:00:34,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1894 transitions. [2021-06-05 16:00:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:34,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:34,621 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:34,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:34,843 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:34,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1487367885, now seen corresponding path program 28 times [2021-06-05 16:00:34,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:34,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176937160] [2021-06-05 16:00:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:35,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:35,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176937160] [2021-06-05 16:00:35,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176937160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:35,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335062726] [2021-06-05 16:00:35,115 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 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 16:00:35,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:35,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:00:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:35,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:35,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:35,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:35,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:35,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:35,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:35,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:35,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 16:00:35,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:35,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:35,365 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 16:00:35,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 16:00:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:35,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335062726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:35,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:35,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 16:00:35,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671847655] [2021-06-05 16:00:35,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:00:35,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:35,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:00:35,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:00:35,386 INFO L87 Difference]: Start difference. First operand 756 states and 1894 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:36,465 INFO L93 Difference]: Finished difference Result 1114 states and 2686 transitions. [2021-06-05 16:00:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:00:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:36,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:36,472 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 16:00:36,473 INFO L226 Difference]: Without dead ends: 1066 [2021-06-05 16:00:36,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1102.0ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:00:36,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-05 16:00:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 785. [2021-06-05 16:00:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.489795918367347) internal successors, (1952), 784 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1952 transitions. [2021-06-05 16:00:36,489 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1952 transitions. Word has length 26 [2021-06-05 16:00:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:36,489 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1952 transitions. [2021-06-05 16:00:36,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:36,489 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1952 transitions. [2021-06-05 16:00:36,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:36,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:36,491 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:36,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 16:00:36,705 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:36,705 INFO L82 PathProgramCache]: Analyzing trace with hash 15104427, now seen corresponding path program 29 times [2021-06-05 16:00:36,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:36,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849943892] [2021-06-05 16:00:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:36,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:36,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849943892] [2021-06-05 16:00:36,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849943892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:36,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214514364] [2021-06-05 16:00:36,955 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 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 16:00:36,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:00:36,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:36,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:00:36,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:37,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:37,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:37,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:37,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:37,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:37,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:37,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 16:00:37,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:37,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:37,197 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 16:00:37,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 16:00:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:37,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214514364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:37,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:37,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 16:00:37,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566635158] [2021-06-05 16:00:37,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:00:37,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:37,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:00:37,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:00:37,218 INFO L87 Difference]: Start difference. First operand 785 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:38,593 INFO L93 Difference]: Finished difference Result 1322 states and 3150 transitions. [2021-06-05 16:00:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:00:38,593 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:38,597 INFO L225 Difference]: With dead ends: 1322 [2021-06-05 16:00:38,598 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 16:00:38,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1324.8ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:00:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 16:00:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 825. [2021-06-05 16:00:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.491504854368932) internal successors, (2053), 824 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2053 transitions. [2021-06-05 16:00:38,619 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2053 transitions. Word has length 26 [2021-06-05 16:00:38,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:38,619 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2053 transitions. [2021-06-05 16:00:38,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2053 transitions. [2021-06-05 16:00:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:38,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:38,621 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:38,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:38,843 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:38,844 INFO L82 PathProgramCache]: Analyzing trace with hash 889695859, now seen corresponding path program 30 times [2021-06-05 16:00:38,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:38,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609091743] [2021-06-05 16:00:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:39,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:39,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609091743] [2021-06-05 16:00:39,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609091743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:39,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405585032] [2021-06-05 16:00:39,085 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 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 16:00:39,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:00:39,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:39,116 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:00:39,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:39,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:39,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:39,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:39,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:39,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:39,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:39,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:39,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 7 [2021-06-05 16:00:39,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:39,534 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.5 percent of original size [2021-06-05 16:00:39,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:39,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:7 [2021-06-05 16:00:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:39,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405585032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:39,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:39,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:00:39,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781310982] [2021-06-05 16:00:39,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:00:39,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:39,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:00:39,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:00:39,558 INFO L87 Difference]: Start difference. First operand 825 states and 2053 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:40,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:40,507 INFO L93 Difference]: Finished difference Result 1058 states and 2506 transitions. [2021-06-05 16:00:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:00:40,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:40,511 INFO L225 Difference]: With dead ends: 1058 [2021-06-05 16:00:40,512 INFO L226 Difference]: Without dead ends: 1026 [2021-06-05 16:00:40,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 981.6ms TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:00:40,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-06-05 16:00:40,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 871. [2021-06-05 16:00:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 2.5068965517241377) internal successors, (2181), 870 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2181 transitions. [2021-06-05 16:00:40,528 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2181 transitions. Word has length 26 [2021-06-05 16:00:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:40,528 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2181 transitions. [2021-06-05 16:00:40,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2181 transitions. [2021-06-05 16:00:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:40,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:40,530 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:40,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:40,745 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:40,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:40,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2122713361, now seen corresponding path program 31 times [2021-06-05 16:00:40,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:40,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487839929] [2021-06-05 16:00:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:40,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:40,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487839929] [2021-06-05 16:00:40,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487839929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:40,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532981806] [2021-06-05 16:00:40,980 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 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 16:00:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:41,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:00:41,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:41,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:41,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:41,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:41,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:41,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:41,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:41,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:41,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 16:00:41,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:41,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:41,224 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 16:00:41,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 16:00:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:41,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532981806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:41,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:41,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 16:00:41,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282399466] [2021-06-05 16:00:41,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:00:41,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:41,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:00:41,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:00:41,246 INFO L87 Difference]: Start difference. First operand 871 states and 2181 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:42,167 INFO L93 Difference]: Finished difference Result 1083 states and 2599 transitions. [2021-06-05 16:00:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:00:42,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:42,170 INFO L225 Difference]: With dead ends: 1083 [2021-06-05 16:00:42,170 INFO L226 Difference]: Without dead ends: 1052 [2021-06-05 16:00:42,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 902.4ms TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:00:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-06-05 16:00:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 900. [2021-06-05 16:00:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.50055617352614) internal successors, (2248), 899 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2248 transitions. [2021-06-05 16:00:42,185 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2248 transitions. Word has length 26 [2021-06-05 16:00:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:42,186 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2248 transitions. [2021-06-05 16:00:42,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2248 transitions. [2021-06-05 16:00:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:42,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:42,187 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:42,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 16:00:42,401 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1180327377, now seen corresponding path program 32 times [2021-06-05 16:00:42,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:42,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424834813] [2021-06-05 16:00:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:42,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:42,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424834813] [2021-06-05 16:00:42,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424834813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:42,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578277023] [2021-06-05 16:00:42,679 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 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 16:00:42,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:42,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:42,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:00:42,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:42,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:42,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:42,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:42,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:42,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:42,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 16:00:42,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:42,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:42,869 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 16:00:42,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 16:00:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:42,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578277023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:42,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:42,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 16:00:42,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450527646] [2021-06-05 16:00:42,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:00:42,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:42,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:00:42,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:00:42,891 INFO L87 Difference]: Start difference. First operand 900 states and 2248 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:44,097 INFO L93 Difference]: Finished difference Result 1238 states and 2925 transitions. [2021-06-05 16:00:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:00:44,097 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:44,101 INFO L225 Difference]: With dead ends: 1238 [2021-06-05 16:00:44,101 INFO L226 Difference]: Without dead ends: 1186 [2021-06-05 16:00:44,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1120.8ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:00:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-05 16:00:44,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 957. [2021-06-05 16:00:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.5) internal successors, (2390), 956 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2390 transitions. [2021-06-05 16:00:44,117 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2390 transitions. Word has length 26 [2021-06-05 16:00:44,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:44,117 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 2390 transitions. [2021-06-05 16:00:44,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:44,118 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2390 transitions. [2021-06-05 16:00:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:44,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:44,119 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:44,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:44,341 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash -514620625, now seen corresponding path program 33 times [2021-06-05 16:00:44,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:44,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862046891] [2021-06-05 16:00:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:44,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:44,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862046891] [2021-06-05 16:00:44,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862046891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:44,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755924438] [2021-06-05 16:00:44,576 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 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 16:00:44,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:00:44,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:44,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:00:44,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:44,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:44,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:44,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:44,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:44,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:44,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:44,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:44,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:44,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 47 [2021-06-05 16:00:44,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:00:44,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:44,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:00:44,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:27 [2021-06-05 16:00:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:44,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755924438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:44,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:44,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:00:44,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875099593] [2021-06-05 16:00:44,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:00:44,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:44,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:00:44,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:00:44,987 INFO L87 Difference]: Start difference. First operand 957 states and 2390 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:46,757 INFO L93 Difference]: Finished difference Result 1077 states and 2608 transitions. [2021-06-05 16:00:46,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:00:46,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:46,760 INFO L225 Difference]: With dead ends: 1077 [2021-06-05 16:00:46,760 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 16:00:46,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1639.2ms TimeCoverageRelationStatistics Valid=309, Invalid=2343, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:00:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 16:00:46,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 964. [2021-06-05 16:00:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 2.4942886812045693) internal successors, (2402), 963 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2402 transitions. [2021-06-05 16:00:46,776 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2402 transitions. Word has length 26 [2021-06-05 16:00:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:46,776 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 2402 transitions. [2021-06-05 16:00:46,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:46,776 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2402 transitions. [2021-06-05 16:00:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:46,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:46,778 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:46,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 16:00:46,989 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:46,989 INFO L82 PathProgramCache]: Analyzing trace with hash 102747963, now seen corresponding path program 34 times [2021-06-05 16:00:46,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:46,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854257303] [2021-06-05 16:00:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:47,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:47,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854257303] [2021-06-05 16:00:47,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854257303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:47,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153962818] [2021-06-05 16:00:47,251 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 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 16:00:47,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:47,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:47,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:00:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:47,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:47,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:47,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:47,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:47,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 16:00:47,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:47,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:47,520 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 16:00:47,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 16:00:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:47,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153962818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:47,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:47,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 16:00:47,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177876729] [2021-06-05 16:00:47,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:00:47,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:47,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:00:47,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:00:47,544 INFO L87 Difference]: Start difference. First operand 964 states and 2402 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:48,583 INFO L93 Difference]: Finished difference Result 1320 states and 3177 transitions. [2021-06-05 16:00:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:00:48,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:48,585 INFO L225 Difference]: With dead ends: 1320 [2021-06-05 16:00:48,585 INFO L226 Difference]: Without dead ends: 1283 [2021-06-05 16:00:48,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1003.7ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:00:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-06-05 16:00:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 995. [2021-06-05 16:00:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.4989939637826963) internal successors, (2484), 994 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2484 transitions. [2021-06-05 16:00:48,598 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2484 transitions. Word has length 26 [2021-06-05 16:00:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:48,598 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2484 transitions. [2021-06-05 16:00:48,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2484 transitions. [2021-06-05 16:00:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:48,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:48,600 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:48,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:48,805 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:48,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1163999753, now seen corresponding path program 35 times [2021-06-05 16:00:48,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:48,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154998725] [2021-06-05 16:00:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:49,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:49,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154998725] [2021-06-05 16:00:49,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154998725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:49,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216079784] [2021-06-05 16:00:49,009 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 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 16:00:49,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:00:49,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:49,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:00:49,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:49,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:49,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:49,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:49,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:49,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:49,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:49,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:49,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 16:00:49,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:49,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:49,246 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 16:00:49,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 16:00:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:49,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216079784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:49,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:49,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 16:00:49,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486590177] [2021-06-05 16:00:49,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:00:49,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:49,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:00:49,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:00:49,263 INFO L87 Difference]: Start difference. First operand 995 states and 2484 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:50,041 INFO L93 Difference]: Finished difference Result 1297 states and 3058 transitions. [2021-06-05 16:00:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:00:50,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:50,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:50,044 INFO L225 Difference]: With dead ends: 1297 [2021-06-05 16:00:50,044 INFO L226 Difference]: Without dead ends: 1263 [2021-06-05 16:00:50,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 717.9ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:00:50,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-06-05 16:00:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1043. [2021-06-05 16:00:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 2.513435700575816) internal successors, (2619), 1042 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 2619 transitions. [2021-06-05 16:00:50,064 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 2619 transitions. Word has length 26 [2021-06-05 16:00:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:50,064 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 2619 transitions. [2021-06-05 16:00:50,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 2619 transitions. [2021-06-05 16:00:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:50,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:50,066 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:50,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 16:00:50,266 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:50,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1726651059, now seen corresponding path program 36 times [2021-06-05 16:00:50,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:50,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262527165] [2021-06-05 16:00:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:50,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:50,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262527165] [2021-06-05 16:00:50,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262527165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:50,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490442530] [2021-06-05 16:00:50,452 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 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 16:00:50,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:00:50,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:50,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:00:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:50,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:50,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:50,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:50,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:50,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-06-05 16:00:50,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:00:50,822 INFO L628 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2021-06-05 16:00:50,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:50,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:50 [2021-06-05 16:00:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:50,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490442530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:50,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:50,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 16:00:50,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139588624] [2021-06-05 16:00:50,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:00:50,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:50,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:00:50,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:00:50,943 INFO L87 Difference]: Start difference. First operand 1043 states and 2619 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:52,819 INFO L93 Difference]: Finished difference Result 1498 states and 3593 transitions. [2021-06-05 16:00:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:00:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:52,821 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 16:00:52,822 INFO L226 Difference]: Without dead ends: 1436 [2021-06-05 16:00:52,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1881.1ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:00:52,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-06-05 16:00:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1086. [2021-06-05 16:00:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.511520737327189) internal successors, (2725), 1085 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2725 transitions. [2021-06-05 16:00:52,839 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2725 transitions. Word has length 26 [2021-06-05 16:00:52,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:52,839 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 2725 transitions. [2021-06-05 16:00:52,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2725 transitions. [2021-06-05 16:00:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:52,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:52,840 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:53,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 16:00:53,041 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:53,041 INFO L82 PathProgramCache]: Analyzing trace with hash 609282159, now seen corresponding path program 37 times [2021-06-05 16:00:53,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:53,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757772278] [2021-06-05 16:00:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:53,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:53,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757772278] [2021-06-05 16:00:53,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757772278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:53,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211017463] [2021-06-05 16:00:53,271 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 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 16:00:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:53,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:00:53,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:53,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:53,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:53,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:53,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:53,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:53,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 16:00:53,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:53,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:53,470 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 16:00:53,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 16:00:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:53,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211017463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:53,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:53,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 16:00:53,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354788364] [2021-06-05 16:00:53,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:00:53,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:53,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:00:53,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:00:53,496 INFO L87 Difference]: Start difference. First operand 1086 states and 2725 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:54,625 INFO L93 Difference]: Finished difference Result 1318 states and 3210 transitions. [2021-06-05 16:00:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:00:54,625 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:54,627 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 16:00:54,627 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 16:00:54,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1067.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:00:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 16:00:54,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1112. [2021-06-05 16:00:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.5013501350135012) internal successors, (2779), 1111 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 2779 transitions. [2021-06-05 16:00:54,640 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 2779 transitions. Word has length 26 [2021-06-05 16:00:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:54,640 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 2779 transitions. [2021-06-05 16:00:54,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 2779 transitions. [2021-06-05 16:00:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:00:54,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:54,641 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:54,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:54,842 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1520712627, now seen corresponding path program 38 times [2021-06-05 16:00:54,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:54,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184272838] [2021-06-05 16:00:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:55,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:55,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184272838] [2021-06-05 16:00:55,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184272838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:55,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458965719] [2021-06-05 16:00:55,060 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 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 16:00:55,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:55,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:00:55,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:55,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:55,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:55,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:55,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:55,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:55,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:55,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:55,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:55,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 16:00:55,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:55,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:55,256 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 16:00:55,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 16:00:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:55,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458965719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:55,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:55,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 16:00:55,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199339863] [2021-06-05 16:00:55,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:00:55,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:55,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:00:55,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:00:55,284 INFO L87 Difference]: Start difference. First operand 1112 states and 2779 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:56,371 INFO L93 Difference]: Finished difference Result 1252 states and 3057 transitions. [2021-06-05 16:00:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:00:56,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:00:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:56,373 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 16:00:56,373 INFO L226 Difference]: Without dead ends: 1245 [2021-06-05 16:00:56,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1058.2ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:00:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-05 16:00:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1121. [2021-06-05 16:00:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.500892857142857) internal successors, (2801), 1120 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 2801 transitions. [2021-06-05 16:00:56,389 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 2801 transitions. Word has length 26 [2021-06-05 16:00:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:56,389 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 2801 transitions. [2021-06-05 16:00:56,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 2801 transitions. [2021-06-05 16:00:56,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:00:56,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:56,391 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:56,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:56,591 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:56,592 INFO L82 PathProgramCache]: Analyzing trace with hash -197112851, now seen corresponding path program 39 times [2021-06-05 16:00:56,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:56,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896010447] [2021-06-05 16:00:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:56,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:56,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896010447] [2021-06-05 16:00:56,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896010447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:56,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753424314] [2021-06-05 16:00:56,681 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 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 16:00:56,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:00:56,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:56,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:00:56,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:56,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753424314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:56,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:56,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 16:00:56,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393477513] [2021-06-05 16:00:56,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:00:56,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:56,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:00:56,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:00:56,890 INFO L87 Difference]: Start difference. First operand 1121 states and 2801 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 16:00:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:57,562 INFO L93 Difference]: Finished difference Result 1649 states and 3850 transitions. [2021-06-05 16:00:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:00:57,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 28 [2021-06-05 16:00:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:57,565 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 16:00:57,565 INFO L226 Difference]: Without dead ends: 1649 [2021-06-05 16:00:57,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 664.8ms TimeCoverageRelationStatistics Valid=772, Invalid=2090, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:00:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-06-05 16:00:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1078. [2021-06-05 16:00:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 2.503249767873723) internal successors, (2696), 1077 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2696 transitions. [2021-06-05 16:00:57,577 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2696 transitions. Word has length 28 [2021-06-05 16:00:57,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:57,577 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 2696 transitions. [2021-06-05 16:00:57,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 16:00:57,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2696 transitions. [2021-06-05 16:00:57,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:00:57,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:57,579 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:57,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:57,781 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1535197913, now seen corresponding path program 40 times [2021-06-05 16:00:57,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:57,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106807169] [2021-06-05 16:00:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:57,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:57,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106807169] [2021-06-05 16:00:57,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106807169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:57,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849067455] [2021-06-05 16:00:57,849 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 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 16:00:57,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:57,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:57,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:00:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:58,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849067455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:58,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:58,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:00:58,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654548125] [2021-06-05 16:00:58,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:00:58,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:58,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:00:58,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:00:58,013 INFO L87 Difference]: Start difference. First operand 1078 states and 2696 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:58,953 INFO L93 Difference]: Finished difference Result 2079 states and 4782 transitions. [2021-06-05 16:00:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:00:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:00:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:58,956 INFO L225 Difference]: With dead ends: 2079 [2021-06-05 16:00:58,956 INFO L226 Difference]: Without dead ends: 2008 [2021-06-05 16:00:58,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 877.7ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:00:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-06-05 16:00:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1257. [2021-06-05 16:00:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.519904458598726) internal successors, (3165), 1256 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3165 transitions. [2021-06-05 16:00:58,980 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3165 transitions. Word has length 28 [2021-06-05 16:00:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:58,981 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 3165 transitions. [2021-06-05 16:00:58,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3165 transitions. [2021-06-05 16:00:58,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:00:58,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:58,982 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:59,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 16:00:59,197 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:59,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1640834073, now seen corresponding path program 41 times [2021-06-05 16:00:59,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:59,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100174674] [2021-06-05 16:00:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:59,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:59,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100174674] [2021-06-05 16:00:59,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100174674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:59,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319790037] [2021-06-05 16:00:59,248 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 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 16:00:59,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:00:59,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:59,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:00:59,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:59,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319790037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:59,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:59,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 16:00:59,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97108698] [2021-06-05 16:00:59,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:00:59,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:59,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:00:59,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:00:59,417 INFO L87 Difference]: Start difference. First operand 1257 states and 3165 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:00,184 INFO L93 Difference]: Finished difference Result 2322 states and 5582 transitions. [2021-06-05 16:01:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:01:00,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:00,188 INFO L225 Difference]: With dead ends: 2322 [2021-06-05 16:01:00,188 INFO L226 Difference]: Without dead ends: 2316 [2021-06-05 16:01:00,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 679.3ms TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:01:00,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-06-05 16:01:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1546. [2021-06-05 16:01:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.5372168284789645) internal successors, (3920), 1545 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3920 transitions. [2021-06-05 16:01:00,217 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3920 transitions. Word has length 28 [2021-06-05 16:01:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:00,217 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 3920 transitions. [2021-06-05 16:01:00,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3920 transitions. [2021-06-05 16:01:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:00,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:00,219 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:00,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:00,433 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:00,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1972512861, now seen corresponding path program 42 times [2021-06-05 16:01:00,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:00,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963323865] [2021-06-05 16:01:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:00,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:00,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963323865] [2021-06-05 16:01:00,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963323865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:00,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167646188] [2021-06-05 16:01:00,483 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 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 16:01:00,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:01:00,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:00,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:00,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:00,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167646188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:00,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:00,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 16:01:00,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516444257] [2021-06-05 16:01:00,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:01:00,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:00,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:01:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:01:00,706 INFO L87 Difference]: Start difference. First operand 1546 states and 3920 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:01,321 INFO L93 Difference]: Finished difference Result 1833 states and 4458 transitions. [2021-06-05 16:01:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:01:01,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:01,327 INFO L225 Difference]: With dead ends: 1833 [2021-06-05 16:01:01,327 INFO L226 Difference]: Without dead ends: 1829 [2021-06-05 16:01:01,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 612.2ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:01:01,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-06-05 16:01:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1518. [2021-06-05 16:01:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 2.5392221489782467) internal successors, (3852), 1517 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 3852 transitions. [2021-06-05 16:01:01,349 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 3852 transitions. Word has length 28 [2021-06-05 16:01:01,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:01,349 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 3852 transitions. [2021-06-05 16:01:01,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:01,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 3852 transitions. [2021-06-05 16:01:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:01,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:01,351 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:01,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:01,569 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:01,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:01,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1204854355, now seen corresponding path program 43 times [2021-06-05 16:01:01,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:01,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31163360] [2021-06-05 16:01:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:01,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:01,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31163360] [2021-06-05 16:01:01,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31163360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:01,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052620936] [2021-06-05 16:01:01,617 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 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 16:01:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:01,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:01,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:01,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052620936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:01,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:01,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 16:01:01,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981970365] [2021-06-05 16:01:01,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:01:01,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:01:01,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:01:01,794 INFO L87 Difference]: Start difference. First operand 1518 states and 3852 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:02,300 INFO L93 Difference]: Finished difference Result 2126 states and 5176 transitions. [2021-06-05 16:01:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:01:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:02,305 INFO L225 Difference]: With dead ends: 2126 [2021-06-05 16:01:02,305 INFO L226 Difference]: Without dead ends: 2117 [2021-06-05 16:01:02,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 437.2ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:01:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-06-05 16:01:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1623. [2021-06-05 16:01:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 2.553020961775586) internal successors, (4141), 1622 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 4141 transitions. [2021-06-05 16:01:02,333 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 4141 transitions. Word has length 28 [2021-06-05 16:01:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:02,333 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 4141 transitions. [2021-06-05 16:01:02,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 4141 transitions. [2021-06-05 16:01:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:02,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:02,335 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:02,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 16:01:02,557 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:02,558 INFO L82 PathProgramCache]: Analyzing trace with hash -760321333, now seen corresponding path program 44 times [2021-06-05 16:01:02,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:02,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596233258] [2021-06-05 16:01:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:02,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:02,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596233258] [2021-06-05 16:01:02,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596233258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:02,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892979828] [2021-06-05 16:01:02,613 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 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 16:01:02,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:02,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:02,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:02,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:02,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892979828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:02,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:02,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 16:01:02,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9860546] [2021-06-05 16:01:02,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:01:02,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:02,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:01:02,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:01:02,799 INFO L87 Difference]: Start difference. First operand 1623 states and 4141 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:03,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:03,464 INFO L93 Difference]: Finished difference Result 2217 states and 5362 transitions. [2021-06-05 16:01:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:01:03,465 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:03,467 INFO L225 Difference]: With dead ends: 2217 [2021-06-05 16:01:03,467 INFO L226 Difference]: Without dead ends: 2207 [2021-06-05 16:01:03,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 611.1ms TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:01:03,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-06-05 16:01:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1676. [2021-06-05 16:01:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 2.5635820895522388) internal successors, (4294), 1675 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 4294 transitions. [2021-06-05 16:01:03,500 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 4294 transitions. Word has length 28 [2021-06-05 16:01:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:03,501 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 4294 transitions. [2021-06-05 16:01:03,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 4294 transitions. [2021-06-05 16:01:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:03,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:03,503 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:03,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 16:01:03,721 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1047790539, now seen corresponding path program 45 times [2021-06-05 16:01:03,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:03,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260512426] [2021-06-05 16:01:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:03,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:03,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260512426] [2021-06-05 16:01:03,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260512426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:03,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813627235] [2021-06-05 16:01:03,782 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 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 16:01:03,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:01:03,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:03,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:03,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:03,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813627235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:03,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:03,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:01:03,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289447299] [2021-06-05 16:01:03,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:01:03,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:01:03,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:01:03,972 INFO L87 Difference]: Start difference. First operand 1676 states and 4294 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:04,619 INFO L93 Difference]: Finished difference Result 2439 states and 5889 transitions. [2021-06-05 16:01:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:01:04,620 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:04,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:04,622 INFO L225 Difference]: With dead ends: 2439 [2021-06-05 16:01:04,622 INFO L226 Difference]: Without dead ends: 2417 [2021-06-05 16:01:04,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 623.7ms TimeCoverageRelationStatistics Valid=724, Invalid=2246, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:01:04,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-05 16:01:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1598. [2021-06-05 16:01:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 2.5510331872260488) internal successors, (4074), 1597 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 4074 transitions. [2021-06-05 16:01:04,657 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 4074 transitions. Word has length 28 [2021-06-05 16:01:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:04,657 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 4074 transitions. [2021-06-05 16:01:04,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 4074 transitions. [2021-06-05 16:01:04,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:04,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:04,660 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:04,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 16:01:04,881 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:04,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:04,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2093633671, now seen corresponding path program 46 times [2021-06-05 16:01:04,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:04,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404559681] [2021-06-05 16:01:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:04,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:04,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404559681] [2021-06-05 16:01:04,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404559681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:04,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495805623] [2021-06-05 16:01:04,952 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 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 16:01:04,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:04,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:04,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:05,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495805623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:05,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:05,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:01:05,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144440334] [2021-06-05 16:01:05,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:01:05,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:05,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:01:05,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:01:05,133 INFO L87 Difference]: Start difference. First operand 1598 states and 4074 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:05,821 INFO L93 Difference]: Finished difference Result 2405 states and 5659 transitions. [2021-06-05 16:01:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:01:05,821 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:05,823 INFO L225 Difference]: With dead ends: 2405 [2021-06-05 16:01:05,823 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 16:01:05,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 624.4ms TimeCoverageRelationStatistics Valid=765, Invalid=2097, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:01:05,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 16:01:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1388. [2021-06-05 16:01:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.5097332372025956) internal successors, (3481), 1387 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3481 transitions. [2021-06-05 16:01:05,849 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3481 transitions. Word has length 28 [2021-06-05 16:01:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:05,849 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3481 transitions. [2021-06-05 16:01:05,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3481 transitions. [2021-06-05 16:01:05,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:05,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:05,850 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:06,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:06,051 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:06,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1416205117, now seen corresponding path program 47 times [2021-06-05 16:01:06,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:06,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523390185] [2021-06-05 16:01:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:06,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:06,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523390185] [2021-06-05 16:01:06,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523390185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:06,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683989551] [2021-06-05 16:01:06,110 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 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 16:01:06,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:01:06,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:06,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:06,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:06,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683989551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:06,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:06,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:01:06,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163937634] [2021-06-05 16:01:06,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:01:06,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:01:06,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:01:06,272 INFO L87 Difference]: Start difference. First operand 1388 states and 3481 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:06,898 INFO L93 Difference]: Finished difference Result 1806 states and 4238 transitions. [2021-06-05 16:01:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:01:06,898 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:06,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:06,900 INFO L225 Difference]: With dead ends: 1806 [2021-06-05 16:01:06,900 INFO L226 Difference]: Without dead ends: 1767 [2021-06-05 16:01:06,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:01:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-05 16:01:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1334. [2021-06-05 16:01:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 2.495873968492123) internal successors, (3327), 1333 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 3327 transitions. [2021-06-05 16:01:06,922 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 3327 transitions. Word has length 28 [2021-06-05 16:01:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:06,922 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 3327 transitions. [2021-06-05 16:01:06,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:06,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 3327 transitions. [2021-06-05 16:01:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:06,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:06,924 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:07,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:07,141 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1362767239, now seen corresponding path program 48 times [2021-06-05 16:01:07,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:07,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863019340] [2021-06-05 16:01:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:07,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:07,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863019340] [2021-06-05 16:01:07,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863019340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:07,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567462268] [2021-06-05 16:01:07,230 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 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 16:01:07,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:01:07,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:07,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:07,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:07,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567462268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:07,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:07,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:01:07,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608341379] [2021-06-05 16:01:07,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:01:07,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:07,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:01:07,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:01:07,419 INFO L87 Difference]: Start difference. First operand 1334 states and 3327 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:08,217 INFO L93 Difference]: Finished difference Result 2351 states and 5515 transitions. [2021-06-05 16:01:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:01:08,218 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:08,220 INFO L225 Difference]: With dead ends: 2351 [2021-06-05 16:01:08,220 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 16:01:08,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 737.1ms TimeCoverageRelationStatistics Valid=892, Invalid=2300, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:01:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 16:01:08,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1439. [2021-06-05 16:01:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.4714881780250346) internal successors, (3554), 1438 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3554 transitions. [2021-06-05 16:01:08,246 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3554 transitions. Word has length 28 [2021-06-05 16:01:08,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:08,247 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 3554 transitions. [2021-06-05 16:01:08,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3554 transitions. [2021-06-05 16:01:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:08,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:08,249 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:08,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:08,471 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:08,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:08,472 INFO L82 PathProgramCache]: Analyzing trace with hash -452605191, now seen corresponding path program 49 times [2021-06-05 16:01:08,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:08,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034078708] [2021-06-05 16:01:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:08,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:08,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034078708] [2021-06-05 16:01:08,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034078708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:08,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257658602] [2021-06-05 16:01:08,523 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 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 16:01:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:08,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:08,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257658602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:08,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:08,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 16:01:08,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207929126] [2021-06-05 16:01:08,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:01:08,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:08,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:01:08,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:01:08,680 INFO L87 Difference]: Start difference. First operand 1439 states and 3554 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:09,265 INFO L93 Difference]: Finished difference Result 1783 states and 4197 transitions. [2021-06-05 16:01:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:01:09,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:09,267 INFO L225 Difference]: With dead ends: 1783 [2021-06-05 16:01:09,267 INFO L226 Difference]: Without dead ends: 1765 [2021-06-05 16:01:09,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=519, Invalid=1737, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:01:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-05 16:01:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1470. [2021-06-05 16:01:09,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.4751531654186523) internal successors, (3636), 1469 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 3636 transitions. [2021-06-05 16:01:09,283 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 3636 transitions. Word has length 28 [2021-06-05 16:01:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:09,283 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 3636 transitions. [2021-06-05 16:01:09,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:09,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 3636 transitions. [2021-06-05 16:01:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:09,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:09,285 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:09,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:09,489 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:09,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:09,489 INFO L82 PathProgramCache]: Analyzing trace with hash 983607605, now seen corresponding path program 50 times [2021-06-05 16:01:09,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:09,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710745773] [2021-06-05 16:01:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:09,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:09,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710745773] [2021-06-05 16:01:09,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710745773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:09,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421831714] [2021-06-05 16:01:09,542 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 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 16:01:09,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:09,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:09,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:09,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:09,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421831714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:09,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:09,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 16:01:09,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13720257] [2021-06-05 16:01:09,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:01:09,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:01:09,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:01:09,715 INFO L87 Difference]: Start difference. First operand 1470 states and 3636 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:10,539 INFO L93 Difference]: Finished difference Result 2870 states and 6981 transitions. [2021-06-05 16:01:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:01:10,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:10,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:10,543 INFO L225 Difference]: With dead ends: 2870 [2021-06-05 16:01:10,543 INFO L226 Difference]: Without dead ends: 2870 [2021-06-05 16:01:10,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 740.6ms TimeCoverageRelationStatistics Valid=1080, Invalid=2580, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:01:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-06-05 16:01:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2266. [2021-06-05 16:01:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 2.5527593818984546) internal successors, (5782), 2265 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 5782 transitions. [2021-06-05 16:01:10,579 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 5782 transitions. Word has length 28 [2021-06-05 16:01:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:10,579 INFO L482 AbstractCegarLoop]: Abstraction has 2266 states and 5782 transitions. [2021-06-05 16:01:10,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 5782 transitions. [2021-06-05 16:01:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:10,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:10,582 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:10,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 16:01:10,797 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:10,797 INFO L82 PathProgramCache]: Analyzing trace with hash -768473619, now seen corresponding path program 51 times [2021-06-05 16:01:10,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:10,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759580737] [2021-06-05 16:01:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:10,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:10,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759580737] [2021-06-05 16:01:10,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759580737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:10,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260907211] [2021-06-05 16:01:10,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:10,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:01:10,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:10,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:10,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:11,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260907211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:11,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:11,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 16:01:11,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643520827] [2021-06-05 16:01:11,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:01:11,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:11,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:01:11,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:01:11,029 INFO L87 Difference]: Start difference. First operand 2266 states and 5782 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:11,581 INFO L93 Difference]: Finished difference Result 2793 states and 6806 transitions. [2021-06-05 16:01:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:01:11,581 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:11,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:11,583 INFO L225 Difference]: With dead ends: 2793 [2021-06-05 16:01:11,583 INFO L226 Difference]: Without dead ends: 2789 [2021-06-05 16:01:11,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 509.1ms TimeCoverageRelationStatistics Valid=634, Invalid=1622, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:01:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-06-05 16:01:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2240. [2021-06-05 16:01:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.5502456453774007) internal successors, (5710), 2239 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5710 transitions. [2021-06-05 16:01:11,609 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5710 transitions. Word has length 28 [2021-06-05 16:01:11,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:11,610 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5710 transitions. [2021-06-05 16:01:11,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5710 transitions. [2021-06-05 16:01:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:11,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:11,613 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:11,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:11,818 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:11,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:11,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1274819885, now seen corresponding path program 52 times [2021-06-05 16:01:11,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:11,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278825604] [2021-06-05 16:01:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:11,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:11,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278825604] [2021-06-05 16:01:11,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278825604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:11,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634552573] [2021-06-05 16:01:11,873 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 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 16:01:11,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:11,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:11,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:11,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:12,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634552573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:12,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:12,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 16:01:12,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257743301] [2021-06-05 16:01:12,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:01:12,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:12,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:01:12,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:01:12,068 INFO L87 Difference]: Start difference. First operand 2240 states and 5710 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:12,623 INFO L93 Difference]: Finished difference Result 2987 states and 7280 transitions. [2021-06-05 16:01:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:01:12,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:12,626 INFO L225 Difference]: With dead ends: 2987 [2021-06-05 16:01:12,626 INFO L226 Difference]: Without dead ends: 2975 [2021-06-05 16:01:12,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 519.1ms TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:01:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-06-05 16:01:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2400. [2021-06-05 16:01:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.5652355147978323) internal successors, (6154), 2399 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6154 transitions. [2021-06-05 16:01:12,657 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6154 transitions. Word has length 28 [2021-06-05 16:01:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:12,657 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6154 transitions. [2021-06-05 16:01:12,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6154 transitions. [2021-06-05 16:01:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:12,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:12,660 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:12,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 16:01:12,875 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:12,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:12,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1502041265, now seen corresponding path program 53 times [2021-06-05 16:01:12,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:12,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015745660] [2021-06-05 16:01:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:12,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:12,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015745660] [2021-06-05 16:01:12,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015745660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:12,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983185860] [2021-06-05 16:01:12,937 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 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 16:01:12,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:01:12,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:12,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:12,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:13,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983185860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:13,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:13,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:01:13,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372153652] [2021-06-05 16:01:13,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:01:13,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:13,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:01:13,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:01:13,143 INFO L87 Difference]: Start difference. First operand 2400 states and 6154 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:13,772 INFO L93 Difference]: Finished difference Result 3282 states and 8012 transitions. [2021-06-05 16:01:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:01:13,772 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:13,775 INFO L225 Difference]: With dead ends: 3282 [2021-06-05 16:01:13,775 INFO L226 Difference]: Without dead ends: 3262 [2021-06-05 16:01:13,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:01:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-06-05 16:01:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 2627. [2021-06-05 16:01:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.5788271134805787) internal successors, (6772), 2626 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 6772 transitions. [2021-06-05 16:01:13,809 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 6772 transitions. Word has length 28 [2021-06-05 16:01:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:13,810 INFO L482 AbstractCegarLoop]: Abstraction has 2627 states and 6772 transitions. [2021-06-05 16:01:13,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 6772 transitions. [2021-06-05 16:01:13,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:01:13,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:13,812 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:14,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 16:01:14,013 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:14,013 INFO L82 PathProgramCache]: Analyzing trace with hash -818455349, now seen corresponding path program 54 times [2021-06-05 16:01:14,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:14,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158397042] [2021-06-05 16:01:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:14,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:14,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158397042] [2021-06-05 16:01:14,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158397042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:14,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898829349] [2021-06-05 16:01:14,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:01:14,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:01:14,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:14,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:01:14,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:14,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898829349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:14,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:14,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:01:14,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697217531] [2021-06-05 16:01:14,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:01:14,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:14,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:01:14,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:01:14,304 INFO L87 Difference]: Start difference. First operand 2627 states and 6772 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:15,047 INFO L93 Difference]: Finished difference Result 3390 states and 8366 transitions. [2021-06-05 16:01:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:01:15,048 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:01:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:15,052 INFO L225 Difference]: With dead ends: 3390 [2021-06-05 16:01:15,052 INFO L226 Difference]: Without dead ends: 3362 [2021-06-05 16:01:15,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 730.0ms TimeCoverageRelationStatistics Valid=778, Invalid=2414, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:01:15,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2021-06-05 16:01:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 2800. [2021-06-05 16:01:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 2.5862808145766345) internal successors, (7239), 2799 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 7239 transitions. [2021-06-05 16:01:15,089 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 7239 transitions. Word has length 28 [2021-06-05 16:01:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:15,089 INFO L482 AbstractCegarLoop]: Abstraction has 2800 states and 7239 transitions. [2021-06-05 16:01:15,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 7239 transitions. [2021-06-05 16:01:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:15,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:15,092 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:15,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:15,304 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash -40043611, now seen corresponding path program 55 times [2021-06-05 16:01:15,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:15,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333968238] [2021-06-05 16:01:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:15,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:15,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333968238] [2021-06-05 16:01:15,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333968238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:15,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616940291] [2021-06-05 16:01:15,600 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 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 16:01:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:15,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:15,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:15,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:15,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:15,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:15,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:15,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:15,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:15,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:15,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:15,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:15,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:15,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:15,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:15,929 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 16:01:15,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:15,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616940291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:15,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:15,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 16:01:15,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710345552] [2021-06-05 16:01:15,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:01:15,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:15,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:01:15,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:01:15,948 INFO L87 Difference]: Start difference. First operand 2800 states and 7239 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:17,712 INFO L93 Difference]: Finished difference Result 3814 states and 9580 transitions. [2021-06-05 16:01:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:01:17,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:17,716 INFO L225 Difference]: With dead ends: 3814 [2021-06-05 16:01:17,716 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 16:01:17,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1582.0ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:01:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 16:01:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2859. [2021-06-05 16:01:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 2.5878236529041287) internal successors, (7396), 2858 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 7396 transitions. [2021-06-05 16:01:17,762 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 7396 transitions. Word has length 30 [2021-06-05 16:01:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:17,762 INFO L482 AbstractCegarLoop]: Abstraction has 2859 states and 7396 transitions. [2021-06-05 16:01:17,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 7396 transitions. [2021-06-05 16:01:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:17,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:17,767 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:17,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 16:01:17,981 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:17,981 INFO L82 PathProgramCache]: Analyzing trace with hash -476580429, now seen corresponding path program 56 times [2021-06-05 16:01:17,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:17,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607552555] [2021-06-05 16:01:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:18,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:18,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607552555] [2021-06-05 16:01:18,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607552555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:18,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868435312] [2021-06-05 16:01:18,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:01:18,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:18,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:18,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:18,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:18,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:18,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:18,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:18,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:18,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:18,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:18,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:18,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:18,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:18,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:18,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:18,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:18,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:18,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:18,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:18,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:18,665 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 16:01:18,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:18,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868435312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:18,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:18,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 16:01:18,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447448247] [2021-06-05 16:01:18,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:01:18,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:18,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:01:18,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:01:18,684 INFO L87 Difference]: Start difference. First operand 2859 states and 7396 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:20,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:20,002 INFO L93 Difference]: Finished difference Result 3790 states and 9553 transitions. [2021-06-05 16:01:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:01:20,003 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:20,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:20,007 INFO L225 Difference]: With dead ends: 3790 [2021-06-05 16:01:20,008 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 16:01:20,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1410.7ms TimeCoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:01:20,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 16:01:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 2912. [2021-06-05 16:01:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2911 states have (on average 2.5774647887323945) internal successors, (7503), 2911 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 7503 transitions. [2021-06-05 16:01:20,040 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 7503 transitions. Word has length 30 [2021-06-05 16:01:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:20,040 INFO L482 AbstractCegarLoop]: Abstraction has 2912 states and 7503 transitions. [2021-06-05 16:01:20,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 7503 transitions. [2021-06-05 16:01:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:20,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:20,043 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:20,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:20,243 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:20,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1012771695, now seen corresponding path program 57 times [2021-06-05 16:01:20,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:20,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650731910] [2021-06-05 16:01:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:20,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:20,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650731910] [2021-06-05 16:01:20,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650731910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:20,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253751143] [2021-06-05 16:01:20,537 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 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 16:01:20,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:01:20,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:20,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:01:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:21,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:21,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:21,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:21,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:21,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:21,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:21,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:21,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2021-06-05 16:01:21,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-06-05 16:01:21,692 INFO L628 ElimStorePlain]: treesize reduction 286, result has 10.9 percent of original size [2021-06-05 16:01:21,699 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 16:01:21,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:22 [2021-06-05 16:01:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:21,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253751143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:21,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:21,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 16:01:21,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118912025] [2021-06-05 16:01:21,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:01:21,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:21,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:01:21,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:01:21,769 INFO L87 Difference]: Start difference. First operand 2912 states and 7503 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:23,552 INFO L93 Difference]: Finished difference Result 3918 states and 9829 transitions. [2021-06-05 16:01:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:01:23,552 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:23,555 INFO L225 Difference]: With dead ends: 3918 [2021-06-05 16:01:23,555 INFO L226 Difference]: Without dead ends: 3872 [2021-06-05 16:01:23,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1795.6ms TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:01:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2021-06-05 16:01:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 2956. [2021-06-05 16:01:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.572250423011844) internal successors, (7601), 2955 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7601 transitions. [2021-06-05 16:01:23,585 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7601 transitions. Word has length 30 [2021-06-05 16:01:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:23,585 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7601 transitions. [2021-06-05 16:01:23,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7601 transitions. [2021-06-05 16:01:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:23,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:23,588 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:23,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-06-05 16:01:23,789 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:23,789 INFO L82 PathProgramCache]: Analyzing trace with hash 290299947, now seen corresponding path program 58 times [2021-06-05 16:01:23,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:23,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097344960] [2021-06-05 16:01:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:24,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097344960] [2021-06-05 16:01:24,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097344960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276289996] [2021-06-05 16:01:24,117 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 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 16:01:24,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:24,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:24,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:24,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:24,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:24,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:24,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:24,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:24,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:24,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:24,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:24,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:24,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:24,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:24,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:24,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:24,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:24,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:24,509 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 16:01:24,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:24,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276289996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:24,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:24,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 16:01:24,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090179225] [2021-06-05 16:01:24,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:01:24,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:24,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:01:24,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:01:24,530 INFO L87 Difference]: Start difference. First operand 2956 states and 7601 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:26,037 INFO L93 Difference]: Finished difference Result 4132 states and 10315 transitions. [2021-06-05 16:01:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:01:26,037 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:26,041 INFO L225 Difference]: With dead ends: 4132 [2021-06-05 16:01:26,041 INFO L226 Difference]: Without dead ends: 4099 [2021-06-05 16:01:26,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1540.3ms TimeCoverageRelationStatistics Valid=412, Invalid=2344, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:01:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-06-05 16:01:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3044. [2021-06-05 16:01:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3043 states have (on average 2.5626026947091685) internal successors, (7798), 3043 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 7798 transitions. [2021-06-05 16:01:26,089 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 7798 transitions. Word has length 30 [2021-06-05 16:01:26,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:26,089 INFO L482 AbstractCegarLoop]: Abstraction has 3044 states and 7798 transitions. [2021-06-05 16:01:26,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 7798 transitions. [2021-06-05 16:01:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:26,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:26,094 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:26,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:26,315 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:26,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1779723289, now seen corresponding path program 59 times [2021-06-05 16:01:26,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:26,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800353887] [2021-06-05 16:01:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:26,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:26,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800353887] [2021-06-05 16:01:26,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800353887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:26,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648437590] [2021-06-05 16:01:26,606 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 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 16:01:26,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:01:26,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:26,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:26,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:26,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:26,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:26,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:26,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:26,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:26,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:26,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:26,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:26,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:26,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:26,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:26,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:26,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:26,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:26,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:26,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:26,892 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 16:01:26,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:26,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648437590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:26,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:26,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 16:01:26,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939140507] [2021-06-05 16:01:26,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:01:26,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:26,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:01:26,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:01:26,912 INFO L87 Difference]: Start difference. First operand 3044 states and 7798 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:28,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:28,734 INFO L93 Difference]: Finished difference Result 4375 states and 10858 transitions. [2021-06-05 16:01:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:01:28,734 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:28,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:28,738 INFO L225 Difference]: With dead ends: 4375 [2021-06-05 16:01:28,738 INFO L226 Difference]: Without dead ends: 4366 [2021-06-05 16:01:28,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1718.2ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:01:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2021-06-05 16:01:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3065. [2021-06-05 16:01:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 2.5682114882506526) internal successors, (7869), 3064 states have internal predecessors, (7869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 7869 transitions. [2021-06-05 16:01:28,775 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 7869 transitions. Word has length 30 [2021-06-05 16:01:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:28,775 INFO L482 AbstractCegarLoop]: Abstraction has 3065 states and 7869 transitions. [2021-06-05 16:01:28,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 7869 transitions. [2021-06-05 16:01:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:28,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:28,779 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:28,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 16:01:28,979 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:28,979 INFO L82 PathProgramCache]: Analyzing trace with hash -110703891, now seen corresponding path program 60 times [2021-06-05 16:01:28,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:28,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097447927] [2021-06-05 16:01:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:29,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:29,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097447927] [2021-06-05 16:01:29,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097447927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:29,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156614367] [2021-06-05 16:01:29,228 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:29,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:01:29,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:29,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:29,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:29,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:29,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:29,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:29,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:29,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:29,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:29,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:29,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:29,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:29,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:29,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:29,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:29,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:29,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:29,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:29,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:29,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:29,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:29,567 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 16:01:29,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:29,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156614367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:29,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:29,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 16:01:29,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117760358] [2021-06-05 16:01:29,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:01:29,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:01:29,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:29,590 INFO L87 Difference]: Start difference. First operand 3065 states and 7869 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:31,325 INFO L93 Difference]: Finished difference Result 4391 states and 10936 transitions. [2021-06-05 16:01:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:01:31,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:31,328 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 16:01:31,328 INFO L226 Difference]: Without dead ends: 4352 [2021-06-05 16:01:31,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1586.2ms TimeCoverageRelationStatistics Valid=431, Invalid=2539, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:01:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-06-05 16:01:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3212. [2021-06-05 16:01:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 3211 states have (on average 2.5580815945188413) internal successors, (8214), 3211 states have internal predecessors, (8214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 8214 transitions. [2021-06-05 16:01:31,362 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 8214 transitions. Word has length 30 [2021-06-05 16:01:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:31,362 INFO L482 AbstractCegarLoop]: Abstraction has 3212 states and 8214 transitions. [2021-06-05 16:01:31,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:31,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 8214 transitions. [2021-06-05 16:01:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:31,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:31,365 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:31,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 16:01:31,565 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:31,565 INFO L82 PathProgramCache]: Analyzing trace with hash -416965491, now seen corresponding path program 61 times [2021-06-05 16:01:31,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:31,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56116097] [2021-06-05 16:01:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:31,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:31,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56116097] [2021-06-05 16:01:31,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56116097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:31,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377849601] [2021-06-05 16:01:31,824 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:31,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:31,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:32,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:32,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:32,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:32,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:32,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:32,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:32,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:32,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:32,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:32,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:32,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:32,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:32,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:32,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:32,110 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 16:01:32,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:32,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377849601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:32,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:32,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 16:01:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835223250] [2021-06-05 16:01:32,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:01:32,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:01:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:01:32,130 INFO L87 Difference]: Start difference. First operand 3212 states and 8214 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:33,693 INFO L93 Difference]: Finished difference Result 3557 states and 8936 transitions. [2021-06-05 16:01:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:01:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:33,697 INFO L225 Difference]: With dead ends: 3557 [2021-06-05 16:01:33,697 INFO L226 Difference]: Without dead ends: 3530 [2021-06-05 16:01:33,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1471.0ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:01:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2021-06-05 16:01:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3247. [2021-06-05 16:01:33,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 2.5523721503388788) internal successors, (8285), 3246 states have internal predecessors, (8285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 8285 transitions. [2021-06-05 16:01:33,730 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 8285 transitions. Word has length 30 [2021-06-05 16:01:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:33,730 INFO L482 AbstractCegarLoop]: Abstraction has 3247 states and 8285 transitions. [2021-06-05 16:01:33,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 8285 transitions. [2021-06-05 16:01:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:33,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:33,736 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:33,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 16:01:33,937 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:33,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:33,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1763395665, now seen corresponding path program 62 times [2021-06-05 16:01:33,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:33,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339101306] [2021-06-05 16:01:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:34,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:34,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339101306] [2021-06-05 16:01:34,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339101306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:34,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795936751] [2021-06-05 16:01:34,206 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:34,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:34,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:34,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:34,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:34,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:34,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:34,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:34,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:34,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:34,571 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 16:01:34,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:34,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795936751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:34,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:34,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 16:01:34,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288595289] [2021-06-05 16:01:34,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:01:34,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:34,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:01:34,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:34,590 INFO L87 Difference]: Start difference. First operand 3247 states and 8285 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:35,906 INFO L93 Difference]: Finished difference Result 4594 states and 11363 transitions. [2021-06-05 16:01:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:01:35,906 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:35,911 INFO L225 Difference]: With dead ends: 4594 [2021-06-05 16:01:35,911 INFO L226 Difference]: Without dead ends: 4561 [2021-06-05 16:01:35,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1423.8ms TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:01:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-05 16:01:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3260. [2021-06-05 16:01:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.5477140227063515) internal successors, (8303), 3259 states have internal predecessors, (8303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 8303 transitions. [2021-06-05 16:01:35,952 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 8303 transitions. Word has length 30 [2021-06-05 16:01:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:35,953 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 8303 transitions. [2021-06-05 16:01:35,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 8303 transitions. [2021-06-05 16:01:35,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:35,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:35,956 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:36,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 16:01:36,156 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:36,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:36,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1372978863, now seen corresponding path program 63 times [2021-06-05 16:01:36,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:36,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608584727] [2021-06-05 16:01:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:01:36,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:36,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608584727] [2021-06-05 16:01:36,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608584727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:36,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037874928] [2021-06-05 16:01:36,462 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:36,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:01:36,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:36,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 16:01:36,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:36,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:36,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:36,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:36,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:36,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:36,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:36,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 151 [2021-06-05 16:01:37,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 16:01:37,125 INFO L628 ElimStorePlain]: treesize reduction 56, result has 40.4 percent of original size [2021-06-05 16:01:37,131 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 16:01:37,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:74 [2021-06-05 16:01:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:37,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037874928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:37,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:37,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 16:01:37,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873913928] [2021-06-05 16:01:37,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:01:37,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:37,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:01:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:01:37,306 INFO L87 Difference]: Start difference. First operand 3260 states and 8303 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:40,456 INFO L93 Difference]: Finished difference Result 4752 states and 11666 transitions. [2021-06-05 16:01:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 16:01:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:40,461 INFO L225 Difference]: With dead ends: 4752 [2021-06-05 16:01:40,461 INFO L226 Difference]: Without dead ends: 4721 [2021-06-05 16:01:40,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 3040.1ms TimeCoverageRelationStatistics Valid=917, Invalid=6565, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 16:01:40,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2021-06-05 16:01:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 3277. [2021-06-05 16:01:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3277 states, 3276 states have (on average 2.5467032967032965) internal successors, (8343), 3276 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 8343 transitions. [2021-06-05 16:01:40,518 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 8343 transitions. Word has length 30 [2021-06-05 16:01:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:40,518 INFO L482 AbstractCegarLoop]: Abstraction has 3277 states and 8343 transitions. [2021-06-05 16:01:40,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 8343 transitions. [2021-06-05 16:01:40,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:40,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:40,522 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:40,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 16:01:40,737 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash 156127441, now seen corresponding path program 64 times [2021-06-05 16:01:40,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:40,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712944365] [2021-06-05 16:01:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:01:41,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:41,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712944365] [2021-06-05 16:01:41,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712944365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:41,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95959311] [2021-06-05 16:01:41,035 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:41,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:41,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:41,065 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:41,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:41,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:41,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:41,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:41,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:41,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:41,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:41,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:41,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:41,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:41,379 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 16:01:41,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:41,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95959311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:41,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:41,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 16:01:41,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853900537] [2021-06-05 16:01:41,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:01:41,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:41,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:01:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:01:41,403 INFO L87 Difference]: Start difference. First operand 3277 states and 8343 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:43,084 INFO L93 Difference]: Finished difference Result 3751 states and 9329 transitions. [2021-06-05 16:01:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:01:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:43,088 INFO L225 Difference]: With dead ends: 3751 [2021-06-05 16:01:43,088 INFO L226 Difference]: Without dead ends: 3733 [2021-06-05 16:01:43,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1686.0ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:01:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2021-06-05 16:01:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3270. [2021-06-05 16:01:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 3269 states have (on average 2.5457326399510554) internal successors, (8322), 3269 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 8322 transitions. [2021-06-05 16:01:43,128 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 8322 transitions. Word has length 30 [2021-06-05 16:01:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:43,129 INFO L482 AbstractCegarLoop]: Abstraction has 3270 states and 8322 transitions. [2021-06-05 16:01:43,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:43,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 8322 transitions. [2021-06-05 16:01:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:43,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:43,131 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:43,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2021-06-05 16:01:43,332 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:43,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1969334097, now seen corresponding path program 65 times [2021-06-05 16:01:43,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:43,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368819177] [2021-06-05 16:01:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:43,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:43,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368819177] [2021-06-05 16:01:43,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368819177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:43,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570397846] [2021-06-05 16:01:43,537 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:43,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:01:43,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:43,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:43,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:43,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:43,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:43,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:43,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:43,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:43,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:43,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:43,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:43,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:43,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:43,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:43,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:43,812 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 16:01:43,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:43,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570397846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:43,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:43,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 16:01:43,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287953349] [2021-06-05 16:01:43,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:01:43,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:43,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:01:43,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:43,828 INFO L87 Difference]: Start difference. First operand 3270 states and 8322 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:44,605 INFO L93 Difference]: Finished difference Result 3590 states and 8850 transitions. [2021-06-05 16:01:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:01:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:44,608 INFO L225 Difference]: With dead ends: 3590 [2021-06-05 16:01:44,608 INFO L226 Difference]: Without dead ends: 3563 [2021-06-05 16:01:44,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 737.1ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:01:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-06-05 16:01:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3273. [2021-06-05 16:01:44,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 2.5403422982885084) internal successors, (8312), 3272 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 8312 transitions. [2021-06-05 16:01:44,696 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 8312 transitions. Word has length 30 [2021-06-05 16:01:44,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:44,696 INFO L482 AbstractCegarLoop]: Abstraction has 3273 states and 8312 transitions. [2021-06-05 16:01:44,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:44,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 8312 transitions. [2021-06-05 16:01:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:44,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:44,699 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:44,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:44,919 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash 255609963, now seen corresponding path program 66 times [2021-06-05 16:01:44,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:44,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349364843] [2021-06-05 16:01:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:45,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:45,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349364843] [2021-06-05 16:01:45,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349364843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:45,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596019518] [2021-06-05 16:01:45,141 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:45,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:01:45,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:45,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:01:45,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:45,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:45,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:45,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:45,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:45,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:45,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:45,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:45,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:45,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-06-05 16:01:45,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:01:45,581 INFO L628 ElimStorePlain]: treesize reduction 92, result has 29.2 percent of original size [2021-06-05 16:01:45,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:45,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-06-05 16:01:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:45,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596019518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:45,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:45,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 16:01:45,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677831232] [2021-06-05 16:01:45,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:01:45,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:45,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:01:45,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:01:45,677 INFO L87 Difference]: Start difference. First operand 3273 states and 8312 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:48,226 INFO L93 Difference]: Finished difference Result 4934 states and 12188 transitions. [2021-06-05 16:01:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:01:48,227 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:48,231 INFO L225 Difference]: With dead ends: 4934 [2021-06-05 16:01:48,231 INFO L226 Difference]: Without dead ends: 4898 [2021-06-05 16:01:48,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2426.4ms TimeCoverageRelationStatistics Valid=851, Invalid=3979, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:01:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-06-05 16:01:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 3309. [2021-06-05 16:01:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 2.557738814993954) internal successors, (8461), 3308 states have internal predecessors, (8461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 8461 transitions. [2021-06-05 16:01:48,277 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 8461 transitions. Word has length 30 [2021-06-05 16:01:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:48,277 INFO L482 AbstractCegarLoop]: Abstraction has 3309 states and 8461 transitions. [2021-06-05 16:01:48,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 8461 transitions. [2021-06-05 16:01:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:48,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:48,279 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:48,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:48,481 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1475159769, now seen corresponding path program 67 times [2021-06-05 16:01:48,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:48,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796300453] [2021-06-05 16:01:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:48,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:48,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796300453] [2021-06-05 16:01:48,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796300453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:48,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926994841] [2021-06-05 16:01:48,792 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:48,820 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:48,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:49,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:49,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:49,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:49,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:49,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:49,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:49,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:49,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:49,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:49,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:49,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:49,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:49,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:49,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:49,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:49,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:49,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:49,166 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 16:01:49,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:49,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926994841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:49,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:49,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 16:01:49,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28031482] [2021-06-05 16:01:49,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:01:49,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:49,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:01:49,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:49,195 INFO L87 Difference]: Start difference. First operand 3309 states and 8461 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:50,693 INFO L93 Difference]: Finished difference Result 3897 states and 9765 transitions. [2021-06-05 16:01:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:01:50,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:50,697 INFO L225 Difference]: With dead ends: 3897 [2021-06-05 16:01:50,697 INFO L226 Difference]: Without dead ends: 3871 [2021-06-05 16:01:50,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1493.0ms TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:01:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-06-05 16:01:50,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3131. [2021-06-05 16:01:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 3130 states have (on average 2.537699680511182) internal successors, (7943), 3130 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 7943 transitions. [2021-06-05 16:01:50,739 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 7943 transitions. Word has length 30 [2021-06-05 16:01:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:50,739 INFO L482 AbstractCegarLoop]: Abstraction has 3131 states and 7943 transitions. [2021-06-05 16:01:50,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 7943 transitions. [2021-06-05 16:01:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:50,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:50,742 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:50,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 16:01:50,942 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:50,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:50,943 INFO L82 PathProgramCache]: Analyzing trace with hash 921316715, now seen corresponding path program 68 times [2021-06-05 16:01:50,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:50,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459915829] [2021-06-05 16:01:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:51,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:51,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459915829] [2021-06-05 16:01:51,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459915829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:51,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133686526] [2021-06-05 16:01:51,176 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:51,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:51,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:51,199 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:51,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:51,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:51,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:51,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:51,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:51,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:51,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:51,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:51,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:51,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:51,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:51,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:51,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:51,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:51,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:51,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:51,431 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 16:01:51,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:51,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133686526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:51,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:51,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 16:01:51,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418315471] [2021-06-05 16:01:51,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:01:51,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:51,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:01:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:51,450 INFO L87 Difference]: Start difference. First operand 3131 states and 7943 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:53,265 INFO L93 Difference]: Finished difference Result 3917 states and 9722 transitions. [2021-06-05 16:01:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:01:53,265 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:53,269 INFO L225 Difference]: With dead ends: 3917 [2021-06-05 16:01:53,269 INFO L226 Difference]: Without dead ends: 3891 [2021-06-05 16:01:53,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1543.5ms TimeCoverageRelationStatistics Valid=494, Invalid=2698, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:01:53,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-06-05 16:01:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3229. [2021-06-05 16:01:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 3228 states have (on average 2.537174721189591) internal successors, (8190), 3228 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 8190 transitions. [2021-06-05 16:01:53,303 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 8190 transitions. Word has length 30 [2021-06-05 16:01:53,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:53,303 INFO L482 AbstractCegarLoop]: Abstraction has 3229 states and 8190 transitions. [2021-06-05 16:01:53,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:53,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 8190 transitions. [2021-06-05 16:01:53,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:53,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:53,306 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:53,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 16:01:53,506 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:53,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2116019763, now seen corresponding path program 69 times [2021-06-05 16:01:53,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:53,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088360375] [2021-06-05 16:01:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:53,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:53,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088360375] [2021-06-05 16:01:53,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088360375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:53,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788575076] [2021-06-05 16:01:53,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:53,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:01:53,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:53,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:01:53,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:54,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:54,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:54,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:54,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:54,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:54,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:54,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:54,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-06-05 16:01:54,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:01:55,034 INFO L628 ElimStorePlain]: treesize reduction 387, result has 8.9 percent of original size [2021-06-05 16:01:55,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:55,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-06-05 16:01:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:55,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788575076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:55,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:55,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 16:01:55,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716703958] [2021-06-05 16:01:55,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:01:55,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:55,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:01:55,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:01:55,177 INFO L87 Difference]: Start difference. First operand 3229 states and 8190 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:58,838 INFO L93 Difference]: Finished difference Result 4685 states and 11648 transitions. [2021-06-05 16:01:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:01:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:01:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:58,844 INFO L225 Difference]: With dead ends: 4685 [2021-06-05 16:01:58,844 INFO L226 Difference]: Without dead ends: 4633 [2021-06-05 16:01:58,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 3386.9ms TimeCoverageRelationStatistics Valid=886, Invalid=4664, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:01:58,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-06-05 16:01:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 3370. [2021-06-05 16:01:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 2.553873552983081) internal successors, (8604), 3369 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 8604 transitions. [2021-06-05 16:01:58,900 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 8604 transitions. Word has length 30 [2021-06-05 16:01:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:58,900 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 8604 transitions. [2021-06-05 16:01:58,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 8604 transitions. [2021-06-05 16:01:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:01:58,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:58,903 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:59,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 16:01:59,104 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:59,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1215646195, now seen corresponding path program 70 times [2021-06-05 16:01:59,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:59,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789106656] [2021-06-05 16:01:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:59,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:59,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789106656] [2021-06-05 16:01:59,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789106656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:59,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374565048] [2021-06-05 16:01:59,358 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:59,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:59,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:59,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:01:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:59,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:59,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:59,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:59,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:59,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:01:59,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:59,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:59,626 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 16:01:59,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:01:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:59,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374565048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:59,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:59,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 16:01:59,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298698171] [2021-06-05 16:01:59,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:01:59,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:59,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:01:59,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:59,643 INFO L87 Difference]: Start difference. First operand 3370 states and 8604 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:00,812 INFO L93 Difference]: Finished difference Result 3767 states and 9411 transitions. [2021-06-05 16:02:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:02:00,812 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:00,816 INFO L225 Difference]: With dead ends: 3767 [2021-06-05 16:02:00,816 INFO L226 Difference]: Without dead ends: 3736 [2021-06-05 16:02:00,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1187.2ms TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:02:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-06-05 16:02:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3431. [2021-06-05 16:02:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 2.53731778425656) internal successors, (8703), 3430 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 8703 transitions. [2021-06-05 16:02:00,854 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 8703 transitions. Word has length 30 [2021-06-05 16:02:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:00,854 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 8703 transitions. [2021-06-05 16:02:00,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 8703 transitions. [2021-06-05 16:02:00,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:00,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:00,857 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:01,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:01,058 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:01,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:01,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1042549111, now seen corresponding path program 71 times [2021-06-05 16:02:01,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:01,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376325544] [2021-06-05 16:02:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:01,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:01,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376325544] [2021-06-05 16:02:01,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376325544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:01,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294240647] [2021-06-05 16:02:01,420 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:01,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:02:01,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:01,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:01,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:01,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:01,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:01,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:01,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:01,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:01,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:01,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:01,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:01,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:01,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:01,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:01,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:01,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:01,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:01,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:01,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:01,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:01,700 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 16:02:01,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:01,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294240647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:01,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:01,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 16:02:01,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259672619] [2021-06-05 16:02:01,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:02:01,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:01,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:02:01,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:02:01,718 INFO L87 Difference]: Start difference. First operand 3431 states and 8703 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:03,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:03,127 INFO L93 Difference]: Finished difference Result 4784 states and 11766 transitions. [2021-06-05 16:02:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:02:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:03,132 INFO L225 Difference]: With dead ends: 4784 [2021-06-05 16:02:03,132 INFO L226 Difference]: Without dead ends: 4733 [2021-06-05 16:02:03,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1380.1ms TimeCoverageRelationStatistics Valid=407, Invalid=2349, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:02:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-06-05 16:02:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 3433. [2021-06-05 16:02:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 2.5367132867132867) internal successors, (8706), 3432 states have internal predecessors, (8706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 8706 transitions. [2021-06-05 16:02:03,171 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 8706 transitions. Word has length 30 [2021-06-05 16:02:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:03,171 INFO L482 AbstractCegarLoop]: Abstraction has 3433 states and 8706 transitions. [2021-06-05 16:02:03,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 8706 transitions. [2021-06-05 16:02:03,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:03,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:03,174 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:03,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 16:02:03,374 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash 190286455, now seen corresponding path program 72 times [2021-06-05 16:02:03,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:03,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848225442] [2021-06-05 16:02:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:02:03,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:03,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848225442] [2021-06-05 16:02:03,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848225442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:03,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777377468] [2021-06-05 16:02:03,644 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:03,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:02:03,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:03,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:02:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:04,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:04,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:04,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:04,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:04,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:04,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:04,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:04,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:04,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:04,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-06-05 16:02:04,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:02:04,272 INFO L628 ElimStorePlain]: treesize reduction 96, result has 28.4 percent of original size [2021-06-05 16:02:04,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:04,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-06-05 16:02:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:04,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777377468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:04,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:04,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 16:02:04,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832453231] [2021-06-05 16:02:04,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:02:04,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:04,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:02:04,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:02:04,410 INFO L87 Difference]: Start difference. First operand 3433 states and 8706 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:07,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:07,150 INFO L93 Difference]: Finished difference Result 4909 states and 12103 transitions. [2021-06-05 16:02:07,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:02:07,150 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:07,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:07,155 INFO L225 Difference]: With dead ends: 4909 [2021-06-05 16:02:07,155 INFO L226 Difference]: Without dead ends: 4866 [2021-06-05 16:02:07,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 2846.0ms TimeCoverageRelationStatistics Valid=894, Invalid=4508, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 16:02:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-06-05 16:02:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3622. [2021-06-05 16:02:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 2.528030930682132) internal successors, (9154), 3621 states have internal predecessors, (9154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 9154 transitions. [2021-06-05 16:02:07,217 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 9154 transitions. Word has length 30 [2021-06-05 16:02:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:07,217 INFO L482 AbstractCegarLoop]: Abstraction has 3622 states and 9154 transitions. [2021-06-05 16:02:07,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 9154 transitions. [2021-06-05 16:02:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:07,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:07,222 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:07,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:07,431 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:07,431 INFO L82 PathProgramCache]: Analyzing trace with hash 760018863, now seen corresponding path program 73 times [2021-06-05 16:02:07,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:07,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69779419] [2021-06-05 16:02:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:07,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:07,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69779419] [2021-06-05 16:02:07,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69779419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:07,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435557917] [2021-06-05 16:02:07,644 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:07,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:07,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:07,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:07,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:07,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:07,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:07,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:07,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:07,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:07,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:07,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:07,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:07,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:07,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:07,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:07,915 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 16:02:07,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:07,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435557917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:07,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:07,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 16:02:07,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558636037] [2021-06-05 16:02:07,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:07,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:07,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:07,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:07,933 INFO L87 Difference]: Start difference. First operand 3622 states and 9154 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:09,239 INFO L93 Difference]: Finished difference Result 3927 states and 9781 transitions. [2021-06-05 16:02:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:02:09,239 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:09,243 INFO L225 Difference]: With dead ends: 3927 [2021-06-05 16:02:09,243 INFO L226 Difference]: Without dead ends: 3899 [2021-06-05 16:02:09,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1289.2ms TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:02:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2021-06-05 16:02:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3664. [2021-06-05 16:02:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3663 states have (on average 2.5263445263445266) internal successors, (9254), 3663 states have internal predecessors, (9254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 9254 transitions. [2021-06-05 16:02:09,282 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 9254 transitions. Word has length 30 [2021-06-05 16:02:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:09,282 INFO L482 AbstractCegarLoop]: Abstraction has 3664 states and 9254 transitions. [2021-06-05 16:02:09,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 9254 transitions. [2021-06-05 16:02:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:09,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:09,285 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:09,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 16:02:09,485 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:09,486 INFO L82 PathProgramCache]: Analyzing trace with hash -224198605, now seen corresponding path program 74 times [2021-06-05 16:02:09,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:09,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461459582] [2021-06-05 16:02:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:09,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:09,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461459582] [2021-06-05 16:02:09,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461459582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:09,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527054337] [2021-06-05 16:02:09,711 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:09,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:02:09,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:09,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:09,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:09,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:09,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:09,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:09,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:09,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:09,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:09,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:09,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:09,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:09,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:09,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:09,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:09,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:09,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:09,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:09,983 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 16:02:09,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:09,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527054337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:09,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:09,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 16:02:09,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566482536] [2021-06-05 16:02:09,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:09,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:09,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:09,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:09,999 INFO L87 Difference]: Start difference. First operand 3664 states and 9254 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:10,848 INFO L93 Difference]: Finished difference Result 4402 states and 10861 transitions. [2021-06-05 16:02:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:02:10,848 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:10,853 INFO L225 Difference]: With dead ends: 4402 [2021-06-05 16:02:10,853 INFO L226 Difference]: Without dead ends: 4365 [2021-06-05 16:02:10,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 831.9ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:02:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2021-06-05 16:02:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 3871. [2021-06-05 16:02:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3870 states have (on average 2.5322997416020674) internal successors, (9800), 3870 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 9800 transitions. [2021-06-05 16:02:10,906 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 9800 transitions. Word has length 30 [2021-06-05 16:02:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:10,906 INFO L482 AbstractCegarLoop]: Abstraction has 3871 states and 9800 transitions. [2021-06-05 16:02:10,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 9800 transitions. [2021-06-05 16:02:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:10,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:10,910 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:11,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 16:02:11,121 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:11,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:11,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2000745455, now seen corresponding path program 75 times [2021-06-05 16:02:11,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:11,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134894581] [2021-06-05 16:02:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:11,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:11,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134894581] [2021-06-05 16:02:11,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134894581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:11,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617001947] [2021-06-05 16:02:11,439 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:11,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:02:11,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:11,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 16:02:11,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:11,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:11,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:11,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 157 [2021-06-05 16:02:12,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:02:12,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:12,051 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 16:02:12,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:46 [2021-06-05 16:02:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:12,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617001947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:12,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:12,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 16:02:12,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683493652] [2021-06-05 16:02:12,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:02:12,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:02:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:02:12,178 INFO L87 Difference]: Start difference. First operand 3871 states and 9800 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:14,606 INFO L93 Difference]: Finished difference Result 4724 states and 11672 transitions. [2021-06-05 16:02:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:02:14,607 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:14,612 INFO L225 Difference]: With dead ends: 4724 [2021-06-05 16:02:14,612 INFO L226 Difference]: Without dead ends: 4685 [2021-06-05 16:02:14,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 2428.5ms TimeCoverageRelationStatistics Valid=538, Invalid=4154, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:02:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2021-06-05 16:02:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 4113. [2021-06-05 16:02:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.524805447470817) internal successors, (10382), 4112 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 10382 transitions. [2021-06-05 16:02:14,670 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 10382 transitions. Word has length 30 [2021-06-05 16:02:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:14,670 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 10382 transitions. [2021-06-05 16:02:14,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 10382 transitions. [2021-06-05 16:02:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:14,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:14,675 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:14,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 16:02:14,889 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:14,889 INFO L82 PathProgramCache]: Analyzing trace with hash 269975723, now seen corresponding path program 76 times [2021-06-05 16:02:14,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:14,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889247699] [2021-06-05 16:02:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:02:15,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:15,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889247699] [2021-06-05 16:02:15,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889247699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:15,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443447664] [2021-06-05 16:02:15,120 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:15,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:02:15,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:15,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:15,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:15,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:15,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:15,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:15,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:15,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:15,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:15,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:15,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:15,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:15,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:15,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:15,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:15,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:15,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:15,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:15,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:15,376 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 16:02:15,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:15,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443447664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:15,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:15,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 16:02:15,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12204001] [2021-06-05 16:02:15,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:15,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:15,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:15,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:15,396 INFO L87 Difference]: Start difference. First operand 4113 states and 10382 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:17,291 INFO L93 Difference]: Finished difference Result 4964 states and 12268 transitions. [2021-06-05 16:02:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:02:17,291 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:17,296 INFO L225 Difference]: With dead ends: 4964 [2021-06-05 16:02:17,297 INFO L226 Difference]: Without dead ends: 4899 [2021-06-05 16:02:17,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1702.5ms TimeCoverageRelationStatistics Valid=486, Invalid=3054, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:02:17,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-06-05 16:02:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4207. [2021-06-05 16:02:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 2.5202092249167856) internal successors, (10600), 4206 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 10600 transitions. [2021-06-05 16:02:17,349 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 10600 transitions. Word has length 30 [2021-06-05 16:02:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:17,349 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 10600 transitions. [2021-06-05 16:02:17,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 10600 transitions. [2021-06-05 16:02:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:17,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:17,353 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:17,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 16:02:17,553 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:17,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1628515089, now seen corresponding path program 77 times [2021-06-05 16:02:17,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:17,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647877768] [2021-06-05 16:02:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:02:17,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:17,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647877768] [2021-06-05 16:02:17,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647877768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:17,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069877584] [2021-06-05 16:02:17,797 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:17,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:02:17,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:17,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:17,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:18,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:18,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:18,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:18,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:18,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:18,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:18,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:18,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:18,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:18,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:18,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:18,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:18,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:18,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:18,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:18,064 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 16:02:18,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:18,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069877584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:18,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:18,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 16:02:18,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844125182] [2021-06-05 16:02:18,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:18,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:18,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:18,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:18,087 INFO L87 Difference]: Start difference. First operand 4207 states and 10600 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:19,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:19,795 INFO L93 Difference]: Finished difference Result 4760 states and 11847 transitions. [2021-06-05 16:02:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:02:19,795 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:19,800 INFO L225 Difference]: With dead ends: 4760 [2021-06-05 16:02:19,800 INFO L226 Difference]: Without dead ends: 4720 [2021-06-05 16:02:19,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1485.1ms TimeCoverageRelationStatistics Valid=360, Invalid=2396, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:02:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4720 states. [2021-06-05 16:02:19,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4720 to 4245. [2021-06-05 16:02:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4245 states, 4244 states have (on average 2.5155513666352496) internal successors, (10676), 4244 states have internal predecessors, (10676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 10676 transitions. [2021-06-05 16:02:19,846 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 10676 transitions. Word has length 30 [2021-06-05 16:02:19,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:19,846 INFO L482 AbstractCegarLoop]: Abstraction has 4245 states and 10676 transitions. [2021-06-05 16:02:19,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 10676 transitions. [2021-06-05 16:02:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:19,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:19,851 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:20,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:20,074 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:20,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1834453521, now seen corresponding path program 78 times [2021-06-05 16:02:20,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:20,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273876539] [2021-06-05 16:02:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:20,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:20,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273876539] [2021-06-05 16:02:20,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273876539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:20,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421127270] [2021-06-05 16:02:20,412 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:20,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:02:20,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:20,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:20,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:20,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:20,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:20,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:20,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:20,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:20,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:20,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:20,699 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 16:02:20,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:20,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421127270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:20,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:20,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 16:02:20,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65842828] [2021-06-05 16:02:20,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:02:20,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:20,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:02:20,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:02:20,720 INFO L87 Difference]: Start difference. First operand 4245 states and 10676 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:22,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:22,668 INFO L93 Difference]: Finished difference Result 4832 states and 11925 transitions. [2021-06-05 16:02:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:02:22,668 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:22,672 INFO L225 Difference]: With dead ends: 4832 [2021-06-05 16:02:22,672 INFO L226 Difference]: Without dead ends: 4777 [2021-06-05 16:02:22,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1839.3ms TimeCoverageRelationStatistics Valid=470, Invalid=3070, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:02:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-06-05 16:02:22,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4315. [2021-06-05 16:02:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4315 states, 4314 states have (on average 2.5127491886879927) internal successors, (10840), 4314 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4315 states to 4315 states and 10840 transitions. [2021-06-05 16:02:22,713 INFO L78 Accepts]: Start accepts. Automaton has 4315 states and 10840 transitions. Word has length 30 [2021-06-05 16:02:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:22,713 INFO L482 AbstractCegarLoop]: Abstraction has 4315 states and 10840 transitions. [2021-06-05 16:02:22,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4315 states and 10840 transitions. [2021-06-05 16:02:22,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:22,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:22,716 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:22,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:22,917 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1966954945, now seen corresponding path program 79 times [2021-06-05 16:02:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:22,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127677563] [2021-06-05 16:02:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:23,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:23,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127677563] [2021-06-05 16:02:23,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127677563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:23,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101912342] [2021-06-05 16:02:23,235 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:23,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:23,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:23,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:23,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:23,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:23,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:23,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:23,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:23,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:23,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:23,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:23,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:23,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:23,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:23,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:23,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:23,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:23,543 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 16:02:23,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:23,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101912342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:23,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:23,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 16:02:23,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191999704] [2021-06-05 16:02:23,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:02:23,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:23,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:02:23,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:02:23,562 INFO L87 Difference]: Start difference. First operand 4315 states and 10840 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:25,173 INFO L93 Difference]: Finished difference Result 5809 states and 14168 transitions. [2021-06-05 16:02:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:02:25,173 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:25,178 INFO L225 Difference]: With dead ends: 5809 [2021-06-05 16:02:25,178 INFO L226 Difference]: Without dead ends: 5760 [2021-06-05 16:02:25,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1486.4ms TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:02:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-06-05 16:02:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 4424. [2021-06-05 16:02:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 2.5130002260908886) internal successors, (11115), 4423 states have internal predecessors, (11115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:25,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 11115 transitions. [2021-06-05 16:02:25,230 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 11115 transitions. Word has length 30 [2021-06-05 16:02:25,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:25,230 INFO L482 AbstractCegarLoop]: Abstraction has 4424 states and 11115 transitions. [2021-06-05 16:02:25,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 11115 transitions. [2021-06-05 16:02:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:25,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:25,234 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:25,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:25,434 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:25,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:25,435 INFO L82 PathProgramCache]: Analyzing trace with hash -477602821, now seen corresponding path program 80 times [2021-06-05 16:02:25,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:25,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398694032] [2021-06-05 16:02:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:25,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:25,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398694032] [2021-06-05 16:02:25,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398694032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:25,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166981096] [2021-06-05 16:02:25,716 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:25,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:02:25,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:25,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:26,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:26,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:26,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:26,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:26,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:26,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:26,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:26,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:26,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:26,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:26,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:26,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:26,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:26,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:26,036 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 16:02:26,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:26,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166981096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:26,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:26,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 16:02:26,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010905675] [2021-06-05 16:02:26,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:02:26,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:26,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:02:26,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:02:26,055 INFO L87 Difference]: Start difference. First operand 4424 states and 11115 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:27,351 INFO L93 Difference]: Finished difference Result 5600 states and 13788 transitions. [2021-06-05 16:02:27,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:02:27,351 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:27,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:27,357 INFO L225 Difference]: With dead ends: 5600 [2021-06-05 16:02:27,357 INFO L226 Difference]: Without dead ends: 5549 [2021-06-05 16:02:27,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1337.2ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:02:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2021-06-05 16:02:27,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 4477. [2021-06-05 16:02:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 2.507372654155496) internal successors, (11223), 4476 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 11223 transitions. [2021-06-05 16:02:27,411 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 11223 transitions. Word has length 30 [2021-06-05 16:02:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:27,411 INFO L482 AbstractCegarLoop]: Abstraction has 4477 states and 11223 transitions. [2021-06-05 16:02:27,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 11223 transitions. [2021-06-05 16:02:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:27,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:27,416 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:27,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:27,616 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1462264581, now seen corresponding path program 81 times [2021-06-05 16:02:27,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:27,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466619120] [2021-06-05 16:02:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:02:27,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:27,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466619120] [2021-06-05 16:02:27,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466619120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:27,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953565207] [2021-06-05 16:02:27,854 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:27,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:02:27,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:27,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:02:27,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:28,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:28,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:28,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:28,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:28,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:28,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:28,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-06-05 16:02:29,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-06-05 16:02:29,115 INFO L628 ElimStorePlain]: treesize reduction 578, result has 6.2 percent of original size [2021-06-05 16:02:29,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-06-05 16:02:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:29,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953565207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:29,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:29,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 16:02:29,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240581120] [2021-06-05 16:02:29,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:02:29,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:29,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:02:29,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:02:29,254 INFO L87 Difference]: Start difference. First operand 4477 states and 11223 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:31,833 INFO L93 Difference]: Finished difference Result 5628 states and 13862 transitions. [2021-06-05 16:02:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:02:31,833 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:31,838 INFO L225 Difference]: With dead ends: 5628 [2021-06-05 16:02:31,838 INFO L226 Difference]: Without dead ends: 5604 [2021-06-05 16:02:31,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2426.5ms TimeCoverageRelationStatistics Valid=675, Invalid=3357, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:02:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-06-05 16:02:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 4485. [2021-06-05 16:02:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4484 states have (on average 2.5064674397859052) internal successors, (11239), 4484 states have internal predecessors, (11239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 11239 transitions. [2021-06-05 16:02:31,887 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 11239 transitions. Word has length 30 [2021-06-05 16:02:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:31,887 INFO L482 AbstractCegarLoop]: Abstraction has 4485 states and 11239 transitions. [2021-06-05 16:02:31,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 11239 transitions. [2021-06-05 16:02:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:31,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:31,892 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:32,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:32,105 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:32,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:32,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1668203013, now seen corresponding path program 82 times [2021-06-05 16:02:32,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:32,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949622470] [2021-06-05 16:02:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:32,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:32,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949622470] [2021-06-05 16:02:32,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949622470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:32,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72242181] [2021-06-05 16:02:32,352 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:32,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:02:32,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:32,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:32,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:32,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:32,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:32,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:32,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:32,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:32,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:32,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:32,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:32,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:32,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:32,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:32,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:32,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:32,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:32,605 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 16:02:32,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:32,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72242181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:32,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:32,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 16:02:32,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489944559] [2021-06-05 16:02:32,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:02:32,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:02:32,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:02:32,625 INFO L87 Difference]: Start difference. First operand 4485 states and 11239 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:34,435 INFO L93 Difference]: Finished difference Result 5013 states and 12435 transitions. [2021-06-05 16:02:34,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:02:34,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:34,440 INFO L225 Difference]: With dead ends: 5013 [2021-06-05 16:02:34,440 INFO L226 Difference]: Without dead ends: 4984 [2021-06-05 16:02:34,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1666.6ms TimeCoverageRelationStatistics Valid=623, Invalid=3037, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:02:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4984 states. [2021-06-05 16:02:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4984 to 4423. [2021-06-05 16:02:34,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 2.4972862957937583) internal successors, (11043), 4422 states have internal predecessors, (11043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 11043 transitions. [2021-06-05 16:02:34,488 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 11043 transitions. Word has length 30 [2021-06-05 16:02:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:34,488 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 11043 transitions. [2021-06-05 16:02:34,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 11043 transitions. [2021-06-05 16:02:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:34,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:34,492 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:34,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 16:02:34,692 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:34,692 INFO L82 PathProgramCache]: Analyzing trace with hash 475012403, now seen corresponding path program 83 times [2021-06-05 16:02:34,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:34,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987856467] [2021-06-05 16:02:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:34,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:34,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987856467] [2021-06-05 16:02:34,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987856467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:34,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549689291] [2021-06-05 16:02:34,896 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:34,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:02:34,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:34,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:34,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:35,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:35,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:35,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:35,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:35,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:35,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:35,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:35,185 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 16:02:35,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:35,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549689291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:35,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:35,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 16:02:35,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012917326] [2021-06-05 16:02:35,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:35,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:35,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:35,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:35,205 INFO L87 Difference]: Start difference. First operand 4423 states and 11043 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:36,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:36,553 INFO L93 Difference]: Finished difference Result 4995 states and 12313 transitions. [2021-06-05 16:02:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:02:36,553 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:36,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:36,558 INFO L225 Difference]: With dead ends: 4995 [2021-06-05 16:02:36,558 INFO L226 Difference]: Without dead ends: 4959 [2021-06-05 16:02:36,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1174.8ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:02:36,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-06-05 16:02:36,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 4643. [2021-06-05 16:02:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.503015941404567) internal successors, (11619), 4642 states have internal predecessors, (11619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 11619 transitions. [2021-06-05 16:02:36,603 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 11619 transitions. Word has length 30 [2021-06-05 16:02:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:36,603 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 11619 transitions. [2021-06-05 16:02:36,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 11619 transitions. [2021-06-05 16:02:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:36,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:36,607 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:36,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 16:02:36,807 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:36,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1805369083, now seen corresponding path program 84 times [2021-06-05 16:02:36,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:36,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836843103] [2021-06-05 16:02:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:37,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:37,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836843103] [2021-06-05 16:02:37,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836843103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:37,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011043259] [2021-06-05 16:02:37,034 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:37,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:02:37,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:37,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 16:02:37,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:37,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:37,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:37,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:37,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:37,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:37,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:37,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:37,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 79 [2021-06-05 16:02:37,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:02:37,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:37,631 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 16:02:37,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:21 [2021-06-05 16:02:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:37,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011043259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:37,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:37,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 16:02:37,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120436688] [2021-06-05 16:02:37,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:02:37,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:37,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:02:37,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:02:37,694 INFO L87 Difference]: Start difference. First operand 4643 states and 11619 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:39,732 INFO L93 Difference]: Finished difference Result 5869 states and 14309 transitions. [2021-06-05 16:02:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:02:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:39,743 INFO L225 Difference]: With dead ends: 5869 [2021-06-05 16:02:39,743 INFO L226 Difference]: Without dead ends: 5852 [2021-06-05 16:02:39,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1753.7ms TimeCoverageRelationStatistics Valid=477, Invalid=3063, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:02:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-06-05 16:02:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 4657. [2021-06-05 16:02:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 2.5053694158075603) internal successors, (11665), 4656 states have internal predecessors, (11665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 11665 transitions. [2021-06-05 16:02:39,799 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 11665 transitions. Word has length 30 [2021-06-05 16:02:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:39,799 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 11665 transitions. [2021-06-05 16:02:39,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:39,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 11665 transitions. [2021-06-05 16:02:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:39,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:39,803 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:40,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 16:02:40,004 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:40,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:40,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1082897335, now seen corresponding path program 85 times [2021-06-05 16:02:40,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:40,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313566330] [2021-06-05 16:02:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:40,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:40,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313566330] [2021-06-05 16:02:40,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313566330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:40,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661460201] [2021-06-05 16:02:40,273 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:40,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:40,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:40,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:40,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:40,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:40,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:40,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:40,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:40,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:40,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:40,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:40,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:40,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:40,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:40,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:40,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:40,547 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 16:02:40,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:40,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661460201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:40,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:40,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 16:02:40,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299881589] [2021-06-05 16:02:40,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:02:40,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:40,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:02:40,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:02:40,564 INFO L87 Difference]: Start difference. First operand 4657 states and 11665 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:41,801 INFO L93 Difference]: Finished difference Result 5656 states and 13885 transitions. [2021-06-05 16:02:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:02:41,802 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:41,807 INFO L225 Difference]: With dead ends: 5656 [2021-06-05 16:02:41,807 INFO L226 Difference]: Without dead ends: 5619 [2021-06-05 16:02:41,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1199.0ms TimeCoverageRelationStatistics Valid=416, Invalid=2236, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:02:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2021-06-05 16:02:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 4600. [2021-06-05 16:02:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 2.5057621222004784) internal successors, (11524), 4599 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 11524 transitions. [2021-06-05 16:02:41,860 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 11524 transitions. Word has length 30 [2021-06-05 16:02:41,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:41,860 INFO L482 AbstractCegarLoop]: Abstraction has 4600 states and 11524 transitions. [2021-06-05 16:02:41,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 11524 transitions. [2021-06-05 16:02:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:41,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:41,864 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:42,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 16:02:42,069 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:42,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1193064333, now seen corresponding path program 86 times [2021-06-05 16:02:42,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:42,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849146395] [2021-06-05 16:02:42,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:02:42,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:42,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849146395] [2021-06-05 16:02:42,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849146395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:42,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530785385] [2021-06-05 16:02:42,335 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:42,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:02:42,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:42,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:42,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:42,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:42,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:42,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:42,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:42,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:42,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:42,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:42,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:42,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:42,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:42,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:42,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:42,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:42,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:42,597 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 16:02:42,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:42,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530785385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:42,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:42,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 16:02:42,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904888629] [2021-06-05 16:02:42,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:42,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:42,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:42,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:42,617 INFO L87 Difference]: Start difference. First operand 4600 states and 11524 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:44,010 INFO L93 Difference]: Finished difference Result 5225 states and 12941 transitions. [2021-06-05 16:02:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:02:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:44,015 INFO L225 Difference]: With dead ends: 5225 [2021-06-05 16:02:44,015 INFO L226 Difference]: Without dead ends: 5199 [2021-06-05 16:02:44,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1391.9ms TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:02:44,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2021-06-05 16:02:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 4667. [2021-06-05 16:02:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.5053579082726105) internal successors, (11690), 4666 states have internal predecessors, (11690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 11690 transitions. [2021-06-05 16:02:44,060 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 11690 transitions. Word has length 30 [2021-06-05 16:02:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:44,061 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 11690 transitions. [2021-06-05 16:02:44,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 11690 transitions. [2021-06-05 16:02:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:44,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:44,064 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:44,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 16:02:44,266 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:44,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:44,267 INFO L82 PathProgramCache]: Analyzing trace with hash -84573205, now seen corresponding path program 87 times [2021-06-05 16:02:44,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:44,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135012896] [2021-06-05 16:02:44,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:44,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:44,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135012896] [2021-06-05 16:02:44,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135012896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:44,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907332144] [2021-06-05 16:02:44,514 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:44,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:02:44,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:44,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 16:02:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:44,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:44,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:44,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:44,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:44,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:44,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 141 [2021-06-05 16:02:45,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-06-05 16:02:45,096 INFO L628 ElimStorePlain]: treesize reduction 68, result has 32.7 percent of original size [2021-06-05 16:02:45,097 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 16:02:45,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:27 [2021-06-05 16:02:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:45,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907332144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:45,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:45,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 16:02:45,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020684041] [2021-06-05 16:02:45,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:02:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:02:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:02:45,191 INFO L87 Difference]: Start difference. First operand 4667 states and 11690 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:47,101 INFO L93 Difference]: Finished difference Result 5151 states and 12701 transitions. [2021-06-05 16:02:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:02:47,102 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:47,107 INFO L225 Difference]: With dead ends: 5151 [2021-06-05 16:02:47,107 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 16:02:47,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1870.3ms TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:02:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 16:02:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4671. [2021-06-05 16:02:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 4670 states have (on average 2.507494646680942) internal successors, (11710), 4670 states have internal predecessors, (11710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 11710 transitions. [2021-06-05 16:02:47,154 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 11710 transitions. Word has length 30 [2021-06-05 16:02:47,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:47,154 INFO L482 AbstractCegarLoop]: Abstraction has 4671 states and 11710 transitions. [2021-06-05 16:02:47,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:47,154 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 11710 transitions. [2021-06-05 16:02:47,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:47,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:47,157 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:47,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:47,358 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:47,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1813763767, now seen corresponding path program 88 times [2021-06-05 16:02:47,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:47,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626958706] [2021-06-05 16:02:47,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:47,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:47,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626958706] [2021-06-05 16:02:47,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626958706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:47,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783780187] [2021-06-05 16:02:47,545 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:47,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:02:47,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:47,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:47,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:47,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:47,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:47,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:47,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:47,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:47,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:47,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:47,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:47,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:47,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:47,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:47,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:47,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:47,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:47,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:47,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:47,822 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 16:02:47,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:47,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783780187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:47,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:47,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 16:02:47,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708793434] [2021-06-05 16:02:47,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:47,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:47,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:47,840 INFO L87 Difference]: Start difference. First operand 4671 states and 11710 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:48,835 INFO L93 Difference]: Finished difference Result 5215 states and 12829 transitions. [2021-06-05 16:02:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:02:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:48,840 INFO L225 Difference]: With dead ends: 5215 [2021-06-05 16:02:48,840 INFO L226 Difference]: Without dead ends: 5184 [2021-06-05 16:02:48,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 879.4ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:02:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2021-06-05 16:02:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 4822. [2021-06-05 16:02:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4822 states, 4821 states have (on average 2.5177349097697572) internal successors, (12138), 4821 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 12138 transitions. [2021-06-05 16:02:48,890 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 12138 transitions. Word has length 30 [2021-06-05 16:02:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:48,890 INFO L482 AbstractCegarLoop]: Abstraction has 4822 states and 12138 transitions. [2021-06-05 16:02:48,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 12138 transitions. [2021-06-05 16:02:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:48,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:48,894 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:49,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:49,095 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash 409447283, now seen corresponding path program 89 times [2021-06-05 16:02:49,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:49,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346424247] [2021-06-05 16:02:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:49,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:49,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346424247] [2021-06-05 16:02:49,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346424247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:49,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858401624] [2021-06-05 16:02:49,333 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:49,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:02:49,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:49,357 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:49,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:49,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:49,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:49,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:49,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:49,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:49,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:49,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:49,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:49,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:49,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:49,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:49,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:49,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:49,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:49,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:49,591 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 16:02:49,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:49,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858401624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:49,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:49,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 16:02:49,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143696990] [2021-06-05 16:02:49,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:49,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:49,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:49,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:49,611 INFO L87 Difference]: Start difference. First operand 4822 states and 12138 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:51,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:51,308 INFO L93 Difference]: Finished difference Result 5370 states and 13300 transitions. [2021-06-05 16:02:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:02:51,309 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:51,314 INFO L225 Difference]: With dead ends: 5370 [2021-06-05 16:02:51,314 INFO L226 Difference]: Without dead ends: 5304 [2021-06-05 16:02:51,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1553.1ms TimeCoverageRelationStatistics Valid=473, Invalid=2833, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:02:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2021-06-05 16:02:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 4896. [2021-06-05 16:02:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4895 states have (on average 2.5141981613891726) internal successors, (12307), 4895 states have internal predecessors, (12307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 12307 transitions. [2021-06-05 16:02:51,364 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 12307 transitions. Word has length 30 [2021-06-05 16:02:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:51,364 INFO L482 AbstractCegarLoop]: Abstraction has 4896 states and 12307 transitions. [2021-06-05 16:02:51,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 12307 transitions. [2021-06-05 16:02:51,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:51,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:51,368 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:51,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 16:02:51,568 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:51,568 INFO L82 PathProgramCache]: Analyzing trace with hash 203508851, now seen corresponding path program 90 times [2021-06-05 16:02:51,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:51,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040825014] [2021-06-05 16:02:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:02:51,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:51,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040825014] [2021-06-05 16:02:51,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040825014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:51,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337493431] [2021-06-05 16:02:51,794 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:51,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:02:51,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:51,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 16:02:51,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:52,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:52,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:52,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:52,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:52,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:52,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:52,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:52,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:52,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 133 [2021-06-05 16:02:52,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:02:52,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:52,378 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 16:02:52,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:88, output treesize:41 [2021-06-05 16:02:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:52,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337493431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:52,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:52,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 16:02:52,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820957968] [2021-06-05 16:02:52,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:02:52,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:52,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:02:52,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:02:52,489 INFO L87 Difference]: Start difference. First operand 4896 states and 12307 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:54,245 INFO L93 Difference]: Finished difference Result 5271 states and 13100 transitions. [2021-06-05 16:02:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:02:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:54,250 INFO L225 Difference]: With dead ends: 5271 [2021-06-05 16:02:54,251 INFO L226 Difference]: Without dead ends: 5223 [2021-06-05 16:02:54,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1664.5ms TimeCoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:02:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-06-05 16:02:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4919. [2021-06-05 16:02:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.5122000813338756) internal successors, (12355), 4918 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 12355 transitions. [2021-06-05 16:02:54,298 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 12355 transitions. Word has length 30 [2021-06-05 16:02:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:54,299 INFO L482 AbstractCegarLoop]: Abstraction has 4919 states and 12355 transitions. [2021-06-05 16:02:54,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 12355 transitions. [2021-06-05 16:02:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:54,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:54,302 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:54,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 16:02:54,503 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash -134828685, now seen corresponding path program 91 times [2021-06-05 16:02:54,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:54,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533616940] [2021-06-05 16:02:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:54,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:54,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533616940] [2021-06-05 16:02:54,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533616940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:54,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258567587] [2021-06-05 16:02:54,772 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:54,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:02:54,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:55,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:55,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:55,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:55,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:55,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:55,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:55,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:55,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:55,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:55,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:55,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:55,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 16:02:55,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:55,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:55,028 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 16:02:55,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 16:02:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:55,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258567587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:55,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:55,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 16:02:55,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397734211] [2021-06-05 16:02:55,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:02:55,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:55,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:02:55,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:02:55,049 INFO L87 Difference]: Start difference. First operand 4919 states and 12355 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:56,806 INFO L93 Difference]: Finished difference Result 5304 states and 13161 transitions. [2021-06-05 16:02:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:02:56,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:02:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:56,811 INFO L225 Difference]: With dead ends: 5304 [2021-06-05 16:02:56,811 INFO L226 Difference]: Without dead ends: 5284 [2021-06-05 16:02:56,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1664.9ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:02:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-06-05 16:02:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4960. [2021-06-05 16:02:56,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 2.51401492236338) internal successors, (12467), 4959 states have internal predecessors, (12467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 12467 transitions. [2021-06-05 16:02:56,860 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 12467 transitions. Word has length 30 [2021-06-05 16:02:56,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:56,860 INFO L482 AbstractCegarLoop]: Abstraction has 4960 states and 12467 transitions. [2021-06-05 16:02:56,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 12467 transitions. [2021-06-05 16:02:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:02:56,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:56,864 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:57,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:57,065 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash -672367353, now seen corresponding path program 92 times [2021-06-05 16:02:57,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:57,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749730944] [2021-06-05 16:02:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:57,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:57,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749730944] [2021-06-05 16:02:57,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749730944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:57,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232971892] [2021-06-05 16:02:57,160 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:57,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:02:57,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:57,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:02:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:57,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232971892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:57,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:57,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 16:02:57,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571482855] [2021-06-05 16:02:57,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:02:57,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:57,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:02:57,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:02:57,379 INFO L87 Difference]: Start difference. First operand 4960 states and 12467 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:58,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:58,427 INFO L93 Difference]: Finished difference Result 6004 states and 14671 transitions. [2021-06-05 16:02:58,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:02:58,427 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:02:58,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:58,433 INFO L225 Difference]: With dead ends: 6004 [2021-06-05 16:02:58,433 INFO L226 Difference]: Without dead ends: 6004 [2021-06-05 16:02:58,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 962.0ms TimeCoverageRelationStatistics Valid=1225, Invalid=3467, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:02:58,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2021-06-05 16:02:58,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 4735. [2021-06-05 16:02:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 2.511406844106464) internal successors, (11889), 4734 states have internal predecessors, (11889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:58,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 11889 transitions. [2021-06-05 16:02:58,486 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 11889 transitions. Word has length 32 [2021-06-05 16:02:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:58,486 INFO L482 AbstractCegarLoop]: Abstraction has 4735 states and 11889 transitions. [2021-06-05 16:02:58,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 11889 transitions. [2021-06-05 16:02:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:02:58,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:58,490 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:58,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 16:02:58,691 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1632455975, now seen corresponding path program 93 times [2021-06-05 16:02:58,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:58,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553530139] [2021-06-05 16:02:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:58,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:58,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553530139] [2021-06-05 16:02:58,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553530139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:58,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126185419] [2021-06-05 16:02:58,771 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:58,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:02:58,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:58,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:02:58,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:59,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126185419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:59,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:59,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 16:02:59,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58583875] [2021-06-05 16:02:59,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:02:59,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:59,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:02:59,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:02:59,017 INFO L87 Difference]: Start difference. First operand 4735 states and 11889 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 16:03:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:00,550 INFO L93 Difference]: Finished difference Result 7971 states and 19194 transitions. [2021-06-05 16:03:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:03:00,551 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 32 [2021-06-05 16:03:00,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:00,559 INFO L225 Difference]: With dead ends: 7971 [2021-06-05 16:03:00,559 INFO L226 Difference]: Without dead ends: 7867 [2021-06-05 16:03:00,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 1423.9ms TimeCoverageRelationStatistics Valid=1727, Invalid=5929, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 16:03:00,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2021-06-05 16:03:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 5211. [2021-06-05 16:03:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5211 states, 5210 states have (on average 2.5299424184261037) internal successors, (13181), 5210 states have internal predecessors, (13181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5211 states to 5211 states and 13181 transitions. [2021-06-05 16:03:00,663 INFO L78 Accepts]: Start accepts. Automaton has 5211 states and 13181 transitions. Word has length 32 [2021-06-05 16:03:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:00,663 INFO L482 AbstractCegarLoop]: Abstraction has 5211 states and 13181 transitions. [2021-06-05 16:03:00,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 16:03:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 5211 states and 13181 transitions. [2021-06-05 16:03:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:00,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:00,667 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:00,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:00,868 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:00,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1308512999, now seen corresponding path program 94 times [2021-06-05 16:03:00,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:00,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140381982] [2021-06-05 16:03:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:00,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:00,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140381982] [2021-06-05 16:03:00,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140381982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:00,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399878441] [2021-06-05 16:03:00,929 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:00,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:03:00,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:00,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:00,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:01,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399878441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:01,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:01,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 16:03:01,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085843220] [2021-06-05 16:03:01,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:03:01,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:01,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:03:01,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:03:01,170 INFO L87 Difference]: Start difference. First operand 5211 states and 13181 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:02,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:02,388 INFO L93 Difference]: Finished difference Result 9415 states and 23381 transitions. [2021-06-05 16:03:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:03:02,388 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:02,397 INFO L225 Difference]: With dead ends: 9415 [2021-06-05 16:03:02,398 INFO L226 Difference]: Without dead ends: 9411 [2021-06-05 16:03:02,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 1086.3ms TimeCoverageRelationStatistics Valid=1604, Invalid=4248, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:03:02,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9411 states. [2021-06-05 16:03:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9411 to 6840. [2021-06-05 16:03:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 2.5451089340546864) internal successors, (17406), 6839 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 17406 transitions. [2021-06-05 16:03:02,493 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 17406 transitions. Word has length 32 [2021-06-05 16:03:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:02,493 INFO L482 AbstractCegarLoop]: Abstraction has 6840 states and 17406 transitions. [2021-06-05 16:03:02,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 17406 transitions. [2021-06-05 16:03:02,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:02,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:02,498 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:02,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:02,700 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:02,700 INFO L82 PathProgramCache]: Analyzing trace with hash 976834211, now seen corresponding path program 95 times [2021-06-05 16:03:02,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:02,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349291766] [2021-06-05 16:03:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:02,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:02,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349291766] [2021-06-05 16:03:02,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349291766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:02,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811078700] [2021-06-05 16:03:02,752 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:02,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 16:03:02,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:02,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811078700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:02,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:02,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 16:03:02,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140625683] [2021-06-05 16:03:02,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:03:02,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:02,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:03:02,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:03:02,952 INFO L87 Difference]: Start difference. First operand 6840 states and 17406 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:03,929 INFO L93 Difference]: Finished difference Result 7287 states and 18264 transitions. [2021-06-05 16:03:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:03:03,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:03,936 INFO L225 Difference]: With dead ends: 7287 [2021-06-05 16:03:03,936 INFO L226 Difference]: Without dead ends: 7283 [2021-06-05 16:03:03,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 887.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:03:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7283 states. [2021-06-05 16:03:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7283 to 6779. [2021-06-05 16:03:03,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6779 states, 6778 states have (on average 2.5457362053703156) internal successors, (17255), 6778 states have internal predecessors, (17255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6779 states to 6779 states and 17255 transitions. [2021-06-05 16:03:04,009 INFO L78 Accepts]: Start accepts. Automaton has 6779 states and 17255 transitions. Word has length 32 [2021-06-05 16:03:04,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:04,009 INFO L482 AbstractCegarLoop]: Abstraction has 6779 states and 17255 transitions. [2021-06-05 16:03:04,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:04,009 INFO L276 IsEmpty]: Start isEmpty. Operand 6779 states and 17255 transitions. [2021-06-05 16:03:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:04,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:04,014 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:04,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable582 [2021-06-05 16:03:04,214 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:04,214 INFO L82 PathProgramCache]: Analyzing trace with hash 542563561, now seen corresponding path program 96 times [2021-06-05 16:03:04,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:04,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835691959] [2021-06-05 16:03:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:04,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:04,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835691959] [2021-06-05 16:03:04,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835691959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:04,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415762254] [2021-06-05 16:03:04,262 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:04,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:03:04,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:04,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:04,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415762254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:04,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:04,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 16:03:04,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613890681] [2021-06-05 16:03:04,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:03:04,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:04,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:03:04,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:03:04,455 INFO L87 Difference]: Start difference. First operand 6779 states and 17255 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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 16:03:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:05,194 INFO L93 Difference]: Finished difference Result 8864 states and 22216 transitions. [2021-06-05 16:03:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:03:05,194 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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 32 [2021-06-05 16:03:05,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:05,203 INFO L225 Difference]: With dead ends: 8864 [2021-06-05 16:03:05,203 INFO L226 Difference]: Without dead ends: 8852 [2021-06-05 16:03:05,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 623.0ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:03:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2021-06-05 16:03:05,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 7049. [2021-06-05 16:03:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7049 states, 7048 states have (on average 2.555192962542565) internal successors, (18009), 7048 states have internal predecessors, (18009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:05,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7049 states to 7049 states and 18009 transitions. [2021-06-05 16:03:05,298 INFO L78 Accepts]: Start accepts. Automaton has 7049 states and 18009 transitions. Word has length 32 [2021-06-05 16:03:05,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:05,298 INFO L482 AbstractCegarLoop]: Abstraction has 7049 states and 18009 transitions. [2021-06-05 16:03:05,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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 16:03:05,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7049 states and 18009 transitions. [2021-06-05 16:03:05,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:05,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:05,303 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:05,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:05,504 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:05,505 INFO L82 PathProgramCache]: Analyzing trace with hash 987096583, now seen corresponding path program 97 times [2021-06-05 16:03:05,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:05,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40961494] [2021-06-05 16:03:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:05,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:05,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40961494] [2021-06-05 16:03:05,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40961494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:05,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181991213] [2021-06-05 16:03:05,574 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:05,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:05,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:05,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181991213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:05,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:05,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 16:03:05,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871828612] [2021-06-05 16:03:05,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:03:05,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:03:05,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:03:05,813 INFO L87 Difference]: Start difference. First operand 7049 states and 18009 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:06,803 INFO L93 Difference]: Finished difference Result 8195 states and 20473 transitions. [2021-06-05 16:03:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:03:06,804 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:06,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:06,812 INFO L225 Difference]: With dead ends: 8195 [2021-06-05 16:03:06,812 INFO L226 Difference]: Without dead ends: 8183 [2021-06-05 16:03:06,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 934.4ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:03:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8183 states. [2021-06-05 16:03:06,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8183 to 7241. [2021-06-05 16:03:06,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7241 states, 7240 states have (on average 2.56353591160221) internal successors, (18560), 7240 states have internal predecessors, (18560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7241 states to 7241 states and 18560 transitions. [2021-06-05 16:03:06,902 INFO L78 Accepts]: Start accepts. Automaton has 7241 states and 18560 transitions. Word has length 32 [2021-06-05 16:03:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:06,902 INFO L482 AbstractCegarLoop]: Abstraction has 7241 states and 18560 transitions. [2021-06-05 16:03:06,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 7241 states and 18560 transitions. [2021-06-05 16:03:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:06,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:06,907 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:07,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:07,108 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:07,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1995895033, now seen corresponding path program 98 times [2021-06-05 16:03:07,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:07,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669003992] [2021-06-05 16:03:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:07,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:07,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669003992] [2021-06-05 16:03:07,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669003992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:07,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207558934] [2021-06-05 16:03:07,169 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:07,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:03:07,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:07,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:07,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:07,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207558934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:07,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:07,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 16:03:07,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803606645] [2021-06-05 16:03:07,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:03:07,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:07,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:03:07,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:03:07,373 INFO L87 Difference]: Start difference. First operand 7241 states and 18560 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:08,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:08,381 INFO L93 Difference]: Finished difference Result 8748 states and 21799 transitions. [2021-06-05 16:03:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:03:08,381 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:08,390 INFO L225 Difference]: With dead ends: 8748 [2021-06-05 16:03:08,390 INFO L226 Difference]: Without dead ends: 8722 [2021-06-05 16:03:08,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 885.2ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:03:08,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8722 states. [2021-06-05 16:03:08,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8722 to 7346. [2021-06-05 16:03:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7346 states, 7345 states have (on average 2.5699115044247787) internal successors, (18876), 7345 states have internal predecessors, (18876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 18876 transitions. [2021-06-05 16:03:08,486 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 18876 transitions. Word has length 32 [2021-06-05 16:03:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:08,486 INFO L482 AbstractCegarLoop]: Abstraction has 7346 states and 18876 transitions. [2021-06-05 16:03:08,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 18876 transitions. [2021-06-05 16:03:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:08,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:08,491 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:08,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-05 16:03:08,692 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:08,692 INFO L82 PathProgramCache]: Analyzing trace with hash 387315719, now seen corresponding path program 99 times [2021-06-05 16:03:08,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:08,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67087951] [2021-06-05 16:03:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:08,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:08,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67087951] [2021-06-05 16:03:08,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67087951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:08,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639935203] [2021-06-05 16:03:08,760 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:08,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 16:03:08,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:08,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:08,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639935203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:08,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:08,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:03:08,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834649069] [2021-06-05 16:03:08,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:03:08,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:08,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:03:08,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:03:08,973 INFO L87 Difference]: Start difference. First operand 7346 states and 18876 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:09,948 INFO L93 Difference]: Finished difference Result 9131 states and 22754 transitions. [2021-06-05 16:03:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 16:03:09,948 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:09,957 INFO L225 Difference]: With dead ends: 9131 [2021-06-05 16:03:09,957 INFO L226 Difference]: Without dead ends: 9101 [2021-06-05 16:03:09,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 894.5ms TimeCoverageRelationStatistics Valid=1246, Invalid=4010, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:03:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9101 states. [2021-06-05 16:03:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9101 to 6682. [2021-06-05 16:03:10,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6681 states have (on average 2.5696751983236044) internal successors, (17168), 6681 states have internal predecessors, (17168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 17168 transitions. [2021-06-05 16:03:10,053 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 17168 transitions. Word has length 32 [2021-06-05 16:03:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:10,054 INFO L482 AbstractCegarLoop]: Abstraction has 6682 states and 17168 transitions. [2021-06-05 16:03:10,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 17168 transitions. [2021-06-05 16:03:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:10,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:10,058 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:10,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 16:03:10,259 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:10,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:10,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1126651079, now seen corresponding path program 100 times [2021-06-05 16:03:10,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:10,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307856497] [2021-06-05 16:03:10,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:10,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:10,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307856497] [2021-06-05 16:03:10,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307856497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:10,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17392914] [2021-06-05 16:03:10,347 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:10,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:03:10,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:10,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:10,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:10,581 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 16:03:10,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17392914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:10,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:10,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 16:03:10,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089881124] [2021-06-05 16:03:10,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:03:10,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:10,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:03:10,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:03:10,582 INFO L87 Difference]: Start difference. First operand 6682 states and 17168 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 16:03:11,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:11,663 INFO L93 Difference]: Finished difference Result 8276 states and 20409 transitions. [2021-06-05 16:03:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:03:11,663 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 32 [2021-06-05 16:03:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:11,670 INFO L225 Difference]: With dead ends: 8276 [2021-06-05 16:03:11,671 INFO L226 Difference]: Without dead ends: 8276 [2021-06-05 16:03:11,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 980.8ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:03:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-05 16:03:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6034. [2021-06-05 16:03:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6034 states, 6033 states have (on average 2.554284767114205) internal successors, (15410), 6033 states have internal predecessors, (15410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 15410 transitions. [2021-06-05 16:03:11,743 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 15410 transitions. Word has length 32 [2021-06-05 16:03:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:11,743 INFO L482 AbstractCegarLoop]: Abstraction has 6034 states and 15410 transitions. [2021-06-05 16:03:11,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 16:03:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 15410 transitions. [2021-06-05 16:03:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:11,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:11,747 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:11,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 16:03:11,948 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:11,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1001568577, now seen corresponding path program 101 times [2021-06-05 16:03:11,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:11,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274374694] [2021-06-05 16:03:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:12,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:12,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274374694] [2021-06-05 16:03:12,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274374694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:12,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797901400] [2021-06-05 16:03:12,023 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:12,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:03:12,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:12,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:12,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:12,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797901400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:12,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:12,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:03:12,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833645642] [2021-06-05 16:03:12,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:03:12,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:12,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:03:12,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:03:12,249 INFO L87 Difference]: Start difference. First operand 6034 states and 15410 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:13,299 INFO L93 Difference]: Finished difference Result 7180 states and 17683 transitions. [2021-06-05 16:03:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:03:13,300 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:13,306 INFO L225 Difference]: With dead ends: 7180 [2021-06-05 16:03:13,306 INFO L226 Difference]: Without dead ends: 7114 [2021-06-05 16:03:13,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 977.0ms TimeCoverageRelationStatistics Valid=1147, Invalid=4109, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:03:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7114 states. [2021-06-05 16:03:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7114 to 6028. [2021-06-05 16:03:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.553177368508379) internal successors, (15388), 6027 states have internal predecessors, (15388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 15388 transitions. [2021-06-05 16:03:13,372 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 15388 transitions. Word has length 32 [2021-06-05 16:03:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:13,372 INFO L482 AbstractCegarLoop]: Abstraction has 6028 states and 15388 transitions. [2021-06-05 16:03:13,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 15388 transitions. [2021-06-05 16:03:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:13,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:13,376 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:13,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:13,576 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash -32333067, now seen corresponding path program 102 times [2021-06-05 16:03:13,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:13,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134949707] [2021-06-05 16:03:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:13,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:13,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134949707] [2021-06-05 16:03:13,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134949707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:13,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449496654] [2021-06-05 16:03:13,649 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:13,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 16:03:13,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:13,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:13,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:13,850 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 16:03:13,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449496654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:13,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:13,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:03:13,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179193789] [2021-06-05 16:03:13,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:03:13,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:13,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:03:13,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:03:13,851 INFO L87 Difference]: Start difference. First operand 6028 states and 15388 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 16:03:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:15,017 INFO L93 Difference]: Finished difference Result 8027 states and 19692 transitions. [2021-06-05 16:03:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:03:15,017 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 32 [2021-06-05 16:03:15,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:15,025 INFO L225 Difference]: With dead ends: 8027 [2021-06-05 16:03:15,025 INFO L226 Difference]: Without dead ends: 8027 [2021-06-05 16:03:15,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 1019.6ms TimeCoverageRelationStatistics Valid=1499, Invalid=4051, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:03:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-06-05 16:03:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 5454. [2021-06-05 16:03:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.526865945351183) internal successors, (13779), 5453 states have internal predecessors, (13779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13779 transitions. [2021-06-05 16:03:15,096 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13779 transitions. Word has length 32 [2021-06-05 16:03:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:15,096 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13779 transitions. [2021-06-05 16:03:15,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 16:03:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13779 transitions. [2021-06-05 16:03:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:15,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:15,100 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:15,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 16:03:15,301 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:15,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1252561661, now seen corresponding path program 103 times [2021-06-05 16:03:15,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:15,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705956504] [2021-06-05 16:03:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:15,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:15,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705956504] [2021-06-05 16:03:15,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705956504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:15,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856810352] [2021-06-05 16:03:15,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:15,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:15,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:15,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856810352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:15,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:15,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 16:03:15,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709875104] [2021-06-05 16:03:15,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:03:15,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:15,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:03:15,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:03:15,582 INFO L87 Difference]: Start difference. First operand 5454 states and 13779 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:16,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:16,545 INFO L93 Difference]: Finished difference Result 6472 states and 15876 transitions. [2021-06-05 16:03:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:03:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:16,551 INFO L225 Difference]: With dead ends: 6472 [2021-06-05 16:03:16,551 INFO L226 Difference]: Without dead ends: 6433 [2021-06-05 16:03:16,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 816.7ms TimeCoverageRelationStatistics Valid=968, Invalid=3454, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:03:16,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-06-05 16:03:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 5454. [2021-06-05 16:03:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.5241151659636896) internal successors, (13764), 5453 states have internal predecessors, (13764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13764 transitions. [2021-06-05 16:03:16,618 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13764 transitions. Word has length 32 [2021-06-05 16:03:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:16,618 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13764 transitions. [2021-06-05 16:03:16,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13764 transitions. [2021-06-05 16:03:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:16,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:16,624 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:16,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-06-05 16:03:16,841 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash -180243655, now seen corresponding path program 104 times [2021-06-05 16:03:16,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:16,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909573913] [2021-06-05 16:03:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:16,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:16,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909573913] [2021-06-05 16:03:16,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909573913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:16,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766507366] [2021-06-05 16:03:16,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:16,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:03:16,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:16,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:16,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:17,099 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 16:03:17,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766507366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:17,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:17,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 16:03:17,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513152934] [2021-06-05 16:03:17,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:03:17,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:17,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:03:17,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:03:17,099 INFO L87 Difference]: Start difference. First operand 5454 states and 13764 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:18,366 INFO L93 Difference]: Finished difference Result 8061 states and 19706 transitions. [2021-06-05 16:03:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:03:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:18,373 INFO L225 Difference]: With dead ends: 8061 [2021-06-05 16:03:18,374 INFO L226 Difference]: Without dead ends: 8061 [2021-06-05 16:03:18,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 1098.4ms TimeCoverageRelationStatistics Valid=1768, Invalid=4552, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 16:03:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-06-05 16:03:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 6057. [2021-06-05 16:03:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6057 states, 6056 states have (on average 2.5155217965653898) internal successors, (15234), 6056 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:18,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 15234 transitions. [2021-06-05 16:03:18,449 INFO L78 Accepts]: Start accepts. Automaton has 6057 states and 15234 transitions. Word has length 32 [2021-06-05 16:03:18,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:18,449 INFO L482 AbstractCegarLoop]: Abstraction has 6057 states and 15234 transitions. [2021-06-05 16:03:18,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:18,449 INFO L276 IsEmpty]: Start isEmpty. Operand 6057 states and 15234 transitions. [2021-06-05 16:03:18,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:18,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:18,454 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:18,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:18,654 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:18,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:18,654 INFO L82 PathProgramCache]: Analyzing trace with hash 729918393, now seen corresponding path program 105 times [2021-06-05 16:03:18,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:18,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447804521] [2021-06-05 16:03:18,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:18,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:18,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447804521] [2021-06-05 16:03:18,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447804521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:18,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180491795] [2021-06-05 16:03:18,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:18,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:03:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:18,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:18,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180491795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:18,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:18,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 16:03:18,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503087781] [2021-06-05 16:03:18,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:03:18,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:18,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:03:18,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:03:18,906 INFO L87 Difference]: Start difference. First operand 6057 states and 15234 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:19,811 INFO L93 Difference]: Finished difference Result 6889 states and 16992 transitions. [2021-06-05 16:03:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:03:19,812 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:19,818 INFO L225 Difference]: With dead ends: 6889 [2021-06-05 16:03:19,818 INFO L226 Difference]: Without dead ends: 6871 [2021-06-05 16:03:19,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 764.7ms TimeCoverageRelationStatistics Valid=879, Invalid=3027, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:03:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-06-05 16:03:19,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 6077. [2021-06-05 16:03:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 6076 states have (on average 2.517774851876234) internal successors, (15298), 6076 states have internal predecessors, (15298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 15298 transitions. [2021-06-05 16:03:19,885 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 15298 transitions. Word has length 32 [2021-06-05 16:03:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:19,885 INFO L482 AbstractCegarLoop]: Abstraction has 6077 states and 15298 transitions. [2021-06-05 16:03:19,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 15298 transitions. [2021-06-05 16:03:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:19,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:19,889 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:20,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:20,090 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:20,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:20,090 INFO L82 PathProgramCache]: Analyzing trace with hash -853693707, now seen corresponding path program 106 times [2021-06-05 16:03:20,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:20,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008796628] [2021-06-05 16:03:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:20,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:20,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008796628] [2021-06-05 16:03:20,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008796628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:20,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590285382] [2021-06-05 16:03:20,152 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:20,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:03:20,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:20,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:20,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:20,376 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 16:03:20,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590285382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:20,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:20,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 16:03:20,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242504474] [2021-06-05 16:03:20,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:03:20,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:20,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:03:20,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:03:20,377 INFO L87 Difference]: Start difference. First operand 6077 states and 15298 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:21,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:21,674 INFO L93 Difference]: Finished difference Result 10330 states and 25935 transitions. [2021-06-05 16:03:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:03:21,675 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:21,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:21,685 INFO L225 Difference]: With dead ends: 10330 [2021-06-05 16:03:21,685 INFO L226 Difference]: Without dead ends: 10330 [2021-06-05 16:03:21,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 1162.1ms TimeCoverageRelationStatistics Valid=2010, Invalid=4962, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 16:03:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10330 states. [2021-06-05 16:03:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10330 to 9091. [2021-06-05 16:03:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9091 states, 9090 states have (on average 2.5674367436743672) internal successors, (23338), 9090 states have internal predecessors, (23338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9091 states to 9091 states and 23338 transitions. [2021-06-05 16:03:21,817 INFO L78 Accepts]: Start accepts. Automaton has 9091 states and 23338 transitions. Word has length 32 [2021-06-05 16:03:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:21,817 INFO L482 AbstractCegarLoop]: Abstraction has 9091 states and 23338 transitions. [2021-06-05 16:03:21,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 9091 states and 23338 transitions. [2021-06-05 16:03:21,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:21,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:21,824 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:22,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:22,025 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:22,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:22,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1689192365, now seen corresponding path program 107 times [2021-06-05 16:03:22,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:22,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500028379] [2021-06-05 16:03:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:22,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:22,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500028379] [2021-06-05 16:03:22,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500028379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:22,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091947327] [2021-06-05 16:03:22,075 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:22,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:03:22,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:22,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:22,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:22,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091947327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:22,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:22,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 16:03:22,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504462701] [2021-06-05 16:03:22,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:03:22,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:22,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:03:22,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:03:22,279 INFO L87 Difference]: Start difference. First operand 9091 states and 23338 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:23,180 INFO L93 Difference]: Finished difference Result 10140 states and 25474 transitions. [2021-06-05 16:03:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:03:23,181 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:23,190 INFO L225 Difference]: With dead ends: 10140 [2021-06-05 16:03:23,191 INFO L226 Difference]: Without dead ends: 10136 [2021-06-05 16:03:23,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 783.3ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:03:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-06-05 16:03:23,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8995. [2021-06-05 16:03:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8995 states, 8994 states have (on average 2.5654881031798977) internal successors, (23074), 8994 states have internal predecessors, (23074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8995 states to 8995 states and 23074 transitions. [2021-06-05 16:03:23,332 INFO L78 Accepts]: Start accepts. Automaton has 8995 states and 23074 transitions. Word has length 32 [2021-06-05 16:03:23,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:23,333 INFO L482 AbstractCegarLoop]: Abstraction has 8995 states and 23074 transitions. [2021-06-05 16:03:23,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 8995 states and 23074 transitions. [2021-06-05 16:03:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:23,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:23,338 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:23,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:23,539 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:23,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:23,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1182846099, now seen corresponding path program 108 times [2021-06-05 16:03:23,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:23,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142888429] [2021-06-05 16:03:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:23,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:23,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142888429] [2021-06-05 16:03:23,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142888429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:23,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855026727] [2021-06-05 16:03:23,594 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:23,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:03:23,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:23,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:23,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:23,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855026727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:23,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:23,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 16:03:23,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634281152] [2021-06-05 16:03:23,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:03:23,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:03:23,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:03:23,791 INFO L87 Difference]: Start difference. First operand 8995 states and 23074 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:24,636 INFO L93 Difference]: Finished difference Result 10548 states and 26516 transitions. [2021-06-05 16:03:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:03:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:24,647 INFO L225 Difference]: With dead ends: 10548 [2021-06-05 16:03:24,647 INFO L226 Difference]: Without dead ends: 10536 [2021-06-05 16:03:24,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 732.9ms TimeCoverageRelationStatistics Valid=1011, Invalid=2895, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:03:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10536 states. [2021-06-05 16:03:24,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10536 to 9183. [2021-06-05 16:03:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9183 states, 9182 states have (on average 2.5686125027227185) internal successors, (23585), 9182 states have internal predecessors, (23585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9183 states to 9183 states and 23585 transitions. [2021-06-05 16:03:24,774 INFO L78 Accepts]: Start accepts. Automaton has 9183 states and 23585 transitions. Word has length 32 [2021-06-05 16:03:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:24,774 INFO L482 AbstractCegarLoop]: Abstraction has 9183 states and 23585 transitions. [2021-06-05 16:03:24,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 9183 states and 23585 transitions. [2021-06-05 16:03:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:24,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:24,783 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:24,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-05 16:03:24,997 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:24,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:24,997 INFO L82 PathProgramCache]: Analyzing trace with hash 955624719, now seen corresponding path program 109 times [2021-06-05 16:03:24,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:24,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817863409] [2021-06-05 16:03:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:25,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:25,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817863409] [2021-06-05 16:03:25,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817863409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:25,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101101923] [2021-06-05 16:03:25,057 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:25,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:25,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:25,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101101923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:25,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:25,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 16:03:25,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015394967] [2021-06-05 16:03:25,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:03:25,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:25,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:03:25,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:03:25,254 INFO L87 Difference]: Start difference. First operand 9183 states and 23585 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:26,157 INFO L93 Difference]: Finished difference Result 11364 states and 28535 transitions. [2021-06-05 16:03:26,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:03:26,158 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:26,169 INFO L225 Difference]: With dead ends: 11364 [2021-06-05 16:03:26,169 INFO L226 Difference]: Without dead ends: 11344 [2021-06-05 16:03:26,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=1025, Invalid=3135, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:03:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11344 states. [2021-06-05 16:03:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11344 to 10146. [2021-06-05 16:03:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10146 states, 10145 states have (on average 2.574075899457861) internal successors, (26114), 10145 states have internal predecessors, (26114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10146 states to 10146 states and 26114 transitions. [2021-06-05 16:03:26,307 INFO L78 Accepts]: Start accepts. Automaton has 10146 states and 26114 transitions. Word has length 32 [2021-06-05 16:03:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:26,307 INFO L482 AbstractCegarLoop]: Abstraction has 10146 states and 26114 transitions. [2021-06-05 16:03:26,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10146 states and 26114 transitions. [2021-06-05 16:03:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:26,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:26,314 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:26,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 16:03:26,514 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:26,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:26,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1639210635, now seen corresponding path program 110 times [2021-06-05 16:03:26,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:26,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724558925] [2021-06-05 16:03:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:03:26,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:26,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724558925] [2021-06-05 16:03:26,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724558925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:26,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308448566] [2021-06-05 16:03:26,584 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:26,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:03:26,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:26,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:26,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:26,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308448566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:26,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:26,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:03:26,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893043069] [2021-06-05 16:03:26,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:03:26,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:26,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:03:26,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:03:26,801 INFO L87 Difference]: Start difference. First operand 10146 states and 26114 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:27,765 INFO L93 Difference]: Finished difference Result 12734 states and 32033 transitions. [2021-06-05 16:03:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:03:27,766 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:27,779 INFO L225 Difference]: With dead ends: 12734 [2021-06-05 16:03:27,779 INFO L226 Difference]: Without dead ends: 12706 [2021-06-05 16:03:27,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 853.9ms TimeCoverageRelationStatistics Valid=1128, Invalid=3564, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:03:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12706 states. [2021-06-05 16:03:27,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12706 to 11409. [2021-06-05 16:03:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 2.579330294530154) internal successors, (29425), 11408 states have internal predecessors, (29425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 29425 transitions. [2021-06-05 16:03:27,968 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 29425 transitions. Word has length 32 [2021-06-05 16:03:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:27,968 INFO L482 AbstractCegarLoop]: Abstraction has 11409 states and 29425 transitions. [2021-06-05 16:03:27,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 29425 transitions. [2021-06-05 16:03:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:03:27,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:27,975 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:28,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 16:03:28,177 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:28,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1435279623, now seen corresponding path program 111 times [2021-06-05 16:03:28,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:28,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656098447] [2021-06-05 16:03:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:28,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:28,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656098447] [2021-06-05 16:03:28,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656098447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:28,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267610524] [2021-06-05 16:03:28,267 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:28,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:03:28,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:28,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:03:28,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:28,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267610524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:28,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:28,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 16:03:28,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97085865] [2021-06-05 16:03:28,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:03:28,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:28,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:03:28,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:03:28,476 INFO L87 Difference]: Start difference. First operand 11409 states and 29425 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:29,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:29,521 INFO L93 Difference]: Finished difference Result 12970 states and 32809 transitions. [2021-06-05 16:03:29,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:03:29,521 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:03:29,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:29,536 INFO L225 Difference]: With dead ends: 12970 [2021-06-05 16:03:29,536 INFO L226 Difference]: Without dead ends: 12934 [2021-06-05 16:03:29,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 955.4ms TimeCoverageRelationStatistics Valid=1318, Invalid=4232, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:03:29,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12934 states. [2021-06-05 16:03:29,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12934 to 11759. [2021-06-05 16:03:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 2.5852185745875147) internal successors, (30397), 11758 states have internal predecessors, (30397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30397 transitions. [2021-06-05 16:03:29,706 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30397 transitions. Word has length 32 [2021-06-05 16:03:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:29,706 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30397 transitions. [2021-06-05 16:03:29,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30397 transitions. [2021-06-05 16:03:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:03:29,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:29,715 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:29,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 16:03:29,915 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:29,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1812733093, now seen corresponding path program 112 times [2021-06-05 16:03:29,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:29,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288621597] [2021-06-05 16:03:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:30,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:30,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288621597] [2021-06-05 16:03:30,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288621597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:30,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638543139] [2021-06-05 16:03:30,285 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:30,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:03:30,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:30,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 16:03:30,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:30,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:30,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:30,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:30,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:30,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:30,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:30,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 16:03:30,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:30,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:30,785 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 16:03:30,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 16:03:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:30,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638543139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:30,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:30,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 16:03:30,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268680322] [2021-06-05 16:03:30,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:03:30,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:30,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:03:30,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:03:30,805 INFO L87 Difference]: Start difference. First operand 11759 states and 30397 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:33,314 INFO L93 Difference]: Finished difference Result 14875 states and 37756 transitions. [2021-06-05 16:03:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:03:33,314 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:03:33,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:33,330 INFO L225 Difference]: With dead ends: 14875 [2021-06-05 16:03:33,330 INFO L226 Difference]: Without dead ends: 14868 [2021-06-05 16:03:33,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 2308.8ms TimeCoverageRelationStatistics Valid=616, Invalid=3674, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:03:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14868 states. [2021-06-05 16:03:33,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14868 to 11941. [2021-06-05 16:03:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11941 states, 11940 states have (on average 2.5852596314907874) internal successors, (30868), 11940 states have internal predecessors, (30868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 30868 transitions. [2021-06-05 16:03:33,510 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 30868 transitions. Word has length 34 [2021-06-05 16:03:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:33,510 INFO L482 AbstractCegarLoop]: Abstraction has 11941 states and 30868 transitions. [2021-06-05 16:03:33,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 30868 transitions. [2021-06-05 16:03:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:03:33,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:33,519 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:33,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 16:03:33,719 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:33,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1087321293, now seen corresponding path program 113 times [2021-06-05 16:03:33,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:33,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850736627] [2021-06-05 16:03:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:34,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:34,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850736627] [2021-06-05 16:03:34,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850736627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:34,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951188309] [2021-06-05 16:03:34,105 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:34,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:03:34,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:34,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 16:03:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:34,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:34,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:34,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:34,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:34,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 16:03:34,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:34,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:34,507 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 16:03:34,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 16:03:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:34,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951188309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:34,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:34,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 16:03:34,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351650609] [2021-06-05 16:03:34,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:03:34,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:34,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:03:34,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:03:34,527 INFO L87 Difference]: Start difference. First operand 11941 states and 30868 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:36,577 INFO L93 Difference]: Finished difference Result 14838 states and 37704 transitions. [2021-06-05 16:03:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:03:36,578 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:03:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:36,593 INFO L225 Difference]: With dead ends: 14838 [2021-06-05 16:03:36,593 INFO L226 Difference]: Without dead ends: 14775 [2021-06-05 16:03:36,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1918.7ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:03:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2021-06-05 16:03:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 11996. [2021-06-05 16:03:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 2.5838265944143393) internal successors, (30993), 11995 states have internal predecessors, (30993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 30993 transitions. [2021-06-05 16:03:36,745 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 30993 transitions. Word has length 34 [2021-06-05 16:03:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:36,746 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 30993 transitions. [2021-06-05 16:03:36,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 30993 transitions. [2021-06-05 16:03:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:03:36,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:36,755 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:36,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:36,955 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:36,956 INFO L82 PathProgramCache]: Analyzing trace with hash -44039697, now seen corresponding path program 114 times [2021-06-05 16:03:36,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:36,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210165668] [2021-06-05 16:03:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:37,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:37,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210165668] [2021-06-05 16:03:37,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210165668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:37,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179646208] [2021-06-05 16:03:37,383 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:37,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:03:37,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:37,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 16:03:37,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:38,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:38,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:38,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:38,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:38,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:38,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:38,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:38,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:38,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:38,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:38,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:38,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:38,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:38,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:38,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:38,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-06-05 16:03:38,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:03:38,189 INFO L628 ElimStorePlain]: treesize reduction 178, result has 16.4 percent of original size [2021-06-05 16:03:38,194 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 16:03:38,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:22 [2021-06-05 16:03:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:38,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179646208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:38,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:38,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-06-05 16:03:38,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934171271] [2021-06-05 16:03:38,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 16:03:38,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:38,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 16:03:38,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:03:38,256 INFO L87 Difference]: Start difference. First operand 11996 states and 30993 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:40,689 INFO L93 Difference]: Finished difference Result 15015 states and 38117 transitions. [2021-06-05 16:03:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:03:40,690 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:03:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:40,705 INFO L225 Difference]: With dead ends: 15015 [2021-06-05 16:03:40,705 INFO L226 Difference]: Without dead ends: 14957 [2021-06-05 16:03:40,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2374.7ms TimeCoverageRelationStatistics Valid=580, Invalid=3452, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:03:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14957 states. [2021-06-05 16:03:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14957 to 12104. [2021-06-05 16:03:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 2.5794431132776996) internal successors, (31219), 12103 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 31219 transitions. [2021-06-05 16:03:40,915 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 31219 transitions. Word has length 34 [2021-06-05 16:03:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:40,915 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 31219 transitions. [2021-06-05 16:03:40,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 31219 transitions. [2021-06-05 16:03:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:03:40,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:40,924 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:41,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 16:03:41,126 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:41,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:41,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1445312427, now seen corresponding path program 115 times [2021-06-05 16:03:41,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:41,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262806507] [2021-06-05 16:03:41,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:41,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:41,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262806507] [2021-06-05 16:03:41,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262806507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:41,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124622790] [2021-06-05 16:03:41,512 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:41,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 16:03:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:41,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:41,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:41,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:41,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:41,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 16:03:41,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:41,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:41,912 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 16:03:41,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 16:03:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:41,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124622790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:41,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:41,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 16:03:41,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516801866] [2021-06-05 16:03:41,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:03:41,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:41,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:03:41,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:03:41,932 INFO L87 Difference]: Start difference. First operand 12104 states and 31219 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:44,240 INFO L93 Difference]: Finished difference Result 15455 states and 39132 transitions. [2021-06-05 16:03:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:03:44,240 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:03:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:44,257 INFO L225 Difference]: With dead ends: 15455 [2021-06-05 16:03:44,257 INFO L226 Difference]: Without dead ends: 15407 [2021-06-05 16:03:44,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2118.6ms TimeCoverageRelationStatistics Valid=552, Invalid=3354, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:03:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15407 states. [2021-06-05 16:03:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15407 to 12292. [2021-06-05 16:03:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12292 states, 12291 states have (on average 2.5755430803026607) internal successors, (31656), 12291 states have internal predecessors, (31656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12292 states to 12292 states and 31656 transitions. [2021-06-05 16:03:44,455 INFO L78 Accepts]: Start accepts. Automaton has 12292 states and 31656 transitions. Word has length 34 [2021-06-05 16:03:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:44,455 INFO L482 AbstractCegarLoop]: Abstraction has 12292 states and 31656 transitions. [2021-06-05 16:03:44,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:44,455 INFO L276 IsEmpty]: Start isEmpty. Operand 12292 states and 31656 transitions. [2021-06-05 16:03:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:03:44,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:44,464 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:44,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:44,664 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:44,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:44,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1347182557, now seen corresponding path program 116 times [2021-06-05 16:03:44,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:44,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122643549] [2021-06-05 16:03:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:44,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:44,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122643549] [2021-06-05 16:03:44,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122643549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:44,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790721677] [2021-06-05 16:03:44,984 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:45,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:03:45,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:45,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 16:03:45,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:45,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:45,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:45,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:45,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:45,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 16:03:45,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:45,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:45,357 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 16:03:45,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 16:03:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:45,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790721677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:45,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:45,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 16:03:45,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310929510] [2021-06-05 16:03:45,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:03:45,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:45,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:03:45,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:03:45,380 INFO L87 Difference]: Start difference. First operand 12292 states and 31656 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:47,887 INFO L93 Difference]: Finished difference Result 16292 states and 41059 transitions. [2021-06-05 16:03:47,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:03:47,889 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:03:47,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:47,907 INFO L225 Difference]: With dead ends: 16292 [2021-06-05 16:03:47,908 INFO L226 Difference]: Without dead ends: 16283 [2021-06-05 16:03:47,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2383.7ms TimeCoverageRelationStatistics Valid=670, Invalid=4586, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:03:47,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16283 states. [2021-06-05 16:03:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16283 to 12441. [2021-06-05 16:03:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12441 states, 12440 states have (on average 2.5761254019292603) internal successors, (32047), 12440 states have internal predecessors, (32047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12441 states to 12441 states and 32047 transitions. [2021-06-05 16:03:48,121 INFO L78 Accepts]: Start accepts. Automaton has 12441 states and 32047 transitions. Word has length 34 [2021-06-05 16:03:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:48,121 INFO L482 AbstractCegarLoop]: Abstraction has 12441 states and 32047 transitions. [2021-06-05 16:03:48,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 12441 states and 32047 transitions. [2021-06-05 16:03:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:03:48,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:48,130 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:48,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:48,333 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1755703351, now seen corresponding path program 117 times [2021-06-05 16:03:48,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:48,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138760127] [2021-06-05 16:03:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:03:48,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:48,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138760127] [2021-06-05 16:03:48,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138760127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:48,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472225704] [2021-06-05 16:03:48,599 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:48,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:03:48,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:48,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 16:03:48,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:49,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:49,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:49,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:49,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:49,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:49,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:49,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:49,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:49,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:49,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 85 treesize of output 171 [2021-06-05 16:03:50,088 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-06-05 16:03:50,203 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-06-05 16:03:50,583 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 300 [2021-06-05 16:03:50,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 16:03:51,016 INFO L628 ElimStorePlain]: treesize reduction 1674, result has 2.0 percent of original size [2021-06-05 16:03:51,020 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 16:03:51,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:22 [2021-06-05 16:03:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:51,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472225704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:51,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:51,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-06-05 16:03:51,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26165526] [2021-06-05 16:03:51,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:03:51,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:51,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:03:51,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:03:51,071 INFO L87 Difference]: Start difference. First operand 12441 states and 32047 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:59,282 INFO L93 Difference]: Finished difference Result 16489 states and 41364 transitions. [2021-06-05 16:03:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:03:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:03:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:59,299 INFO L225 Difference]: With dead ends: 16489 [2021-06-05 16:03:59,299 INFO L226 Difference]: Without dead ends: 16467 [2021-06-05 16:03:59,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 3716.6ms TimeCoverageRelationStatistics Valid=553, Invalid=4417, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:03:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16467 states. [2021-06-05 16:03:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16467 to 12451. [2021-06-05 16:03:59,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 2.575421686746988) internal successors, (32064), 12450 states have internal predecessors, (32064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 32064 transitions. [2021-06-05 16:03:59,506 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 32064 transitions. Word has length 34 [2021-06-05 16:03:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:59,506 INFO L482 AbstractCegarLoop]: Abstraction has 12451 states and 32064 transitions. [2021-06-05 16:03:59,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 32064 transitions. [2021-06-05 16:03:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:03:59,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:59,515 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:59,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-06-05 16:03:59,716 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:59,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1270909581, now seen corresponding path program 118 times [2021-06-05 16:03:59,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:59,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692472623] [2021-06-05 16:03:59,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:04:00,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:00,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692472623] [2021-06-05 16:04:00,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692472623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:00,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998610654] [2021-06-05 16:04:00,008 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:00,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:04:00,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:00,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 16:04:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:00,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:00,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:00,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:00,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:00,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:00,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 16:04:00,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:00,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:00,496 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 16:04:00,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 16:04:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:00,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998610654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:00,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:00,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 16:04:00,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250297722] [2021-06-05 16:04:00,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:04:00,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:00,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:04:00,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:04:00,521 INFO L87 Difference]: Start difference. First operand 12451 states and 32064 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:02,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:02,661 INFO L93 Difference]: Finished difference Result 16411 states and 41283 transitions. [2021-06-05 16:04:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:04:02,662 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:04:02,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:02,680 INFO L225 Difference]: With dead ends: 16411 [2021-06-05 16:04:02,681 INFO L226 Difference]: Without dead ends: 16378 [2021-06-05 16:04:02,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2036.4ms TimeCoverageRelationStatistics Valid=524, Invalid=3136, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:04:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16378 states. [2021-06-05 16:04:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16378 to 12565. [2021-06-05 16:04:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 2.572110792741165) internal successors, (32316), 12564 states have internal predecessors, (32316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 32316 transitions. [2021-06-05 16:04:02,850 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 32316 transitions. Word has length 34 [2021-06-05 16:04:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:02,850 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 32316 transitions. [2021-06-05 16:04:02,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 32316 transitions. [2021-06-05 16:04:02,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:04:02,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:02,859 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:03,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:03,059 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:03,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:03,059 INFO L82 PathProgramCache]: Analyzing trace with hash 954034479, now seen corresponding path program 119 times [2021-06-05 16:04:03,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:03,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119759466] [2021-06-05 16:04:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:04:03,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:03,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119759466] [2021-06-05 16:04:03,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119759466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:03,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715641465] [2021-06-05 16:04:03,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:03,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:04:03,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:03,316 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 16:04:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:03,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:03,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:03,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:03,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:03,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 16:04:03,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:03,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:03,657 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 16:04:03,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 16:04:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:03,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715641465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:03,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:03,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 16:04:03,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021291719] [2021-06-05 16:04:03,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:04:03,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:03,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:04:03,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:04:03,759 INFO L87 Difference]: Start difference. First operand 12565 states and 32316 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:06,614 INFO L93 Difference]: Finished difference Result 16814 states and 42191 transitions. [2021-06-05 16:04:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:04:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:04:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:06,632 INFO L225 Difference]: With dead ends: 16814 [2021-06-05 16:04:06,632 INFO L226 Difference]: Without dead ends: 16795 [2021-06-05 16:04:06,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2483.2ms TimeCoverageRelationStatistics Valid=709, Invalid=4841, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:04:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-06-05 16:04:06,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 12569. [2021-06-05 16:04:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12569 states, 12568 states have (on average 2.5725652450668366) internal successors, (32332), 12568 states have internal predecessors, (32332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12569 states to 12569 states and 32332 transitions. [2021-06-05 16:04:06,807 INFO L78 Accepts]: Start accepts. Automaton has 12569 states and 32332 transitions. Word has length 34 [2021-06-05 16:04:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:06,807 INFO L482 AbstractCegarLoop]: Abstraction has 12569 states and 32332 transitions. [2021-06-05 16:04:06,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 12569 states and 32332 transitions. [2021-06-05 16:04:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:04:06,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:06,817 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:07,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:07,017 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:07,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:07,017 INFO L82 PathProgramCache]: Analyzing trace with hash -766181841, now seen corresponding path program 120 times [2021-06-05 16:04:07,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:07,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42141014] [2021-06-05 16:04:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:04:07,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:07,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42141014] [2021-06-05 16:04:07,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42141014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:07,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580630489] [2021-06-05 16:04:07,320 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:07,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:04:07,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:07,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 16:04:07,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:08,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:08,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:08,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:08,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:08,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:08,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:08,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:08,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:08,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:08,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:08,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-06-05 16:04:08,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:08,130 INFO L628 ElimStorePlain]: treesize reduction 220, result has 13.7 percent of original size [2021-06-05 16:04:08,134 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 16:04:08,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:16 [2021-06-05 16:04:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:08,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580630489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:08,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:08,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-06-05 16:04:08,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250421496] [2021-06-05 16:04:08,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 16:04:08,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:08,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 16:04:08,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:04:08,193 INFO L87 Difference]: Start difference. First operand 12569 states and 32332 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:10,575 INFO L93 Difference]: Finished difference Result 15950 states and 40250 transitions. [2021-06-05 16:04:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:04:10,575 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:04:10,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:10,592 INFO L225 Difference]: With dead ends: 15950 [2021-06-05 16:04:10,592 INFO L226 Difference]: Without dead ends: 15904 [2021-06-05 16:04:10,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 2328.1ms TimeCoverageRelationStatistics Valid=615, Invalid=3675, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:04:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15904 states. [2021-06-05 16:04:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15904 to 12573. [2021-06-05 16:04:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12573 states, 12572 states have (on average 2.5706331530384983) internal successors, (32318), 12572 states have internal predecessors, (32318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12573 states to 12573 states and 32318 transitions. [2021-06-05 16:04:10,759 INFO L78 Accepts]: Start accepts. Automaton has 12573 states and 32318 transitions. Word has length 34 [2021-06-05 16:04:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:10,759 INFO L482 AbstractCegarLoop]: Abstraction has 12573 states and 32318 transitions. [2021-06-05 16:04:10,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:10,759 INFO L276 IsEmpty]: Start isEmpty. Operand 12573 states and 32318 transitions. [2021-06-05 16:04:10,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:04:10,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:10,768 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:10,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-06-05 16:04:10,969 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:10,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:10,969 INFO L82 PathProgramCache]: Analyzing trace with hash -769209587, now seen corresponding path program 121 times [2021-06-05 16:04:10,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:10,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116357876] [2021-06-05 16:04:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:04:11,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:11,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116357876] [2021-06-05 16:04:11,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116357876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:11,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019409805] [2021-06-05 16:04:11,217 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:11,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 16:04:11,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:11,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:11,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:11,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:11,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:11,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:11,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:11,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 16:04:11,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:11,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:11,591 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 16:04:11,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 16:04:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:11,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019409805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:11,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:11,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 16:04:11,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562162046] [2021-06-05 16:04:11,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:04:11,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:11,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:04:11,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:04:11,611 INFO L87 Difference]: Start difference. First operand 12573 states and 32318 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:13,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:13,746 INFO L93 Difference]: Finished difference Result 13633 states and 34575 transitions. [2021-06-05 16:04:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:04:13,747 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:04:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:13,762 INFO L225 Difference]: With dead ends: 13633 [2021-06-05 16:04:13,762 INFO L226 Difference]: Without dead ends: 13606 [2021-06-05 16:04:13,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1945.4ms TimeCoverageRelationStatistics Valid=438, Invalid=3344, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:04:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2021-06-05 16:04:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 12605. [2021-06-05 16:04:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12605 states, 12604 states have (on average 2.5693430656934306) internal successors, (32384), 12604 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12605 states to 12605 states and 32384 transitions. [2021-06-05 16:04:13,917 INFO L78 Accepts]: Start accepts. Automaton has 12605 states and 32384 transitions. Word has length 34 [2021-06-05 16:04:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:13,917 INFO L482 AbstractCegarLoop]: Abstraction has 12605 states and 32384 transitions. [2021-06-05 16:04:13,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 12605 states and 32384 transitions. [2021-06-05 16:04:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:04:13,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:13,927 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:14,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:14,127 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:14,127 INFO L82 PathProgramCache]: Analyzing trace with hash -915560657, now seen corresponding path program 122 times [2021-06-05 16:04:14,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:14,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313442482] [2021-06-05 16:04:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:04:14,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:14,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313442482] [2021-06-05 16:04:14,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313442482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:14,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224068186] [2021-06-05 16:04:14,424 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:14,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:04:14,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:14,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 16:04:14,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:14,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:14,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:14,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:14,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:14,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:14,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 16:04:14,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:14,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:14,792 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 16:04:14,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 16:04:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:14,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224068186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:14,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:14,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 16:04:14,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405208331] [2021-06-05 16:04:14,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:04:14,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:14,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:04:14,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:04:14,810 INFO L87 Difference]: Start difference. First operand 12605 states and 32384 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:16,842 INFO L93 Difference]: Finished difference Result 16746 states and 42145 transitions. [2021-06-05 16:04:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:04:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:04:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:16,861 INFO L225 Difference]: With dead ends: 16746 [2021-06-05 16:04:16,861 INFO L226 Difference]: Without dead ends: 16713 [2021-06-05 16:04:16,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1940.5ms TimeCoverageRelationStatistics Valid=641, Invalid=3519, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:04:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16713 states. [2021-06-05 16:04:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16713 to 12629. [2021-06-05 16:04:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5682610072853977) internal successors, (32432), 12628 states have internal predecessors, (32432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32432 transitions. [2021-06-05 16:04:17,031 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32432 transitions. Word has length 34 [2021-06-05 16:04:17,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:17,031 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32432 transitions. [2021-06-05 16:04:17,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:17,032 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32432 transitions. [2021-06-05 16:04:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:04:17,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:17,041 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:17,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable882 [2021-06-05 16:04:17,243 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:17,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:17,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1309383403, now seen corresponding path program 123 times [2021-06-05 16:04:17,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:17,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447342435] [2021-06-05 16:04:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:04:17,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:17,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447342435] [2021-06-05 16:04:17,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447342435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:17,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102472022] [2021-06-05 16:04:17,510 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:17,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:04:17,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:17,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 16:04:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:18,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:18,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:18,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 97 treesize of output 247 [2021-06-05 16:04:18,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:04:19,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:19,007 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 16:04:19,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:122, output treesize:74 [2021-06-05 16:04:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:19,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102472022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:19,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:19,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-06-05 16:04:19,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065156611] [2021-06-05 16:04:19,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 16:04:19,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:19,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 16:04:19,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:04:19,161 INFO L87 Difference]: Start difference. First operand 12629 states and 32432 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:23,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:23,610 INFO L93 Difference]: Finished difference Result 16941 states and 42462 transitions. [2021-06-05 16:04:23,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 16:04:23,611 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:04:23,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:23,629 INFO L225 Difference]: With dead ends: 16941 [2021-06-05 16:04:23,630 INFO L226 Difference]: Without dead ends: 16910 [2021-06-05 16:04:23,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 3922.8ms TimeCoverageRelationStatistics Valid=1133, Invalid=9373, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 16:04:23,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16910 states. [2021-06-05 16:04:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16910 to 12629. [2021-06-05 16:04:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5688945201140325) internal successors, (32440), 12628 states have internal predecessors, (32440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32440 transitions. [2021-06-05 16:04:23,822 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32440 transitions. Word has length 34 [2021-06-05 16:04:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:23,822 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32440 transitions. [2021-06-05 16:04:23,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:23,823 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32440 transitions. [2021-06-05 16:04:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:04:23,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:23,832 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:24,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 16:04:24,041 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash 92531981, now seen corresponding path program 124 times [2021-06-05 16:04:24,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:24,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754574528] [2021-06-05 16:04:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:04:24,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:24,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754574528] [2021-06-05 16:04:24,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754574528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:24,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690999682] [2021-06-05 16:04:24,302 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:24,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:04:24,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:24,327 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 16:04:24,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:24,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:24,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:24,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:24,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:24,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:24,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:24,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 16:04:24,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:24,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:24,743 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 16:04:24,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 16:04:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:24,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690999682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:24,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:24,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 16:04:24,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358488261] [2021-06-05 16:04:24,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:04:24,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:24,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:04:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:04:24,764 INFO L87 Difference]: Start difference. First operand 12629 states and 32440 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:27,050 INFO L93 Difference]: Finished difference Result 13890 states and 35182 transitions. [2021-06-05 16:04:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:04:27,051 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:04:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:27,066 INFO L225 Difference]: With dead ends: 13890 [2021-06-05 16:04:27,067 INFO L226 Difference]: Without dead ends: 13872 [2021-06-05 16:04:27,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 2087.8ms TimeCoverageRelationStatistics Valid=541, Invalid=3881, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:04:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13872 states. [2021-06-05 16:04:27,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13872 to 12614. [2021-06-05 16:04:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 2.568857527947356) internal successors, (32401), 12613 states have internal predecessors, (32401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 32401 transitions. [2021-06-05 16:04:27,225 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 32401 transitions. Word has length 34 [2021-06-05 16:04:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:27,225 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 32401 transitions. [2021-06-05 16:04:27,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 32401 transitions. [2021-06-05 16:04:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:04:27,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:27,235 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:27,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-05 16:04:27,435 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:27,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2032929557, now seen corresponding path program 125 times [2021-06-05 16:04:27,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:27,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542202218] [2021-06-05 16:04:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:27,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:27,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542202218] [2021-06-05 16:04:27,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542202218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:27,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984196306] [2021-06-05 16:04:27,687 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:27,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 16:04:27,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:27,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 16:04:27,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:28,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:28,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:28,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:28,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:28,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:28,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 16:04:28,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:28,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:28,059 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 16:04:28,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 16:04:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:28,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984196306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:28,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:28,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 16:04:28,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830770952] [2021-06-05 16:04:28,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:04:28,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:28,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:04:28,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:04:28,080 INFO L87 Difference]: Start difference. First operand 12614 states and 32401 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:29,398 INFO L93 Difference]: Finished difference Result 13122 states and 33247 transitions. [2021-06-05 16:04:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:04:29,399 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:04:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:29,411 INFO L225 Difference]: With dead ends: 13122 [2021-06-05 16:04:29,411 INFO L226 Difference]: Without dead ends: 13095 [2021-06-05 16:04:29,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1114.1ms TimeCoverageRelationStatistics Valid=335, Invalid=1921, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:04:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-06-05 16:04:29,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 12617. [2021-06-05 16:04:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12617 states, 12616 states have (on average 2.565472415979708) internal successors, (32366), 12616 states have internal predecessors, (32366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 32366 transitions. [2021-06-05 16:04:29,593 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 32366 transitions. Word has length 34 [2021-06-05 16:04:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:29,593 INFO L482 AbstractCegarLoop]: Abstraction has 12617 states and 32366 transitions. [2021-06-05 16:04:29,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 32366 transitions. [2021-06-05 16:04:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:04:29,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:29,603 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:29,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable942,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:29,803 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:29,803 INFO L82 PathProgramCache]: Analyzing trace with hash 192014503, now seen corresponding path program 126 times [2021-06-05 16:04:29,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:29,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984092619] [2021-06-05 16:04:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:30,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:30,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984092619] [2021-06-05 16:04:30,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984092619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:30,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136177841] [2021-06-05 16:04:30,058 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:30,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 16:04:30,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:30,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 16:04:30,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:30,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:30,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:30,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:30,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:30,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:30,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:30,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:30,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:30,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:30,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:30,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 89 treesize of output 241 [2021-06-05 16:04:31,353 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 196 [2021-06-05 16:04:32,308 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 403 [2021-06-05 16:04:32,750 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-06-05 16:04:33,242 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-06-05 16:04:33,801 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 498 [2021-06-05 16:04:34,245 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 528 [2021-06-05 16:04:34,528 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 109 [2021-06-05 16:04:35,691 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 579 [2021-06-05 16:04:36,229 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 712 [2021-06-05 16:04:37,106 WARN L205 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 898 [2021-06-05 16:04:37,760 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 235 [2021-06-05 16:04:38,370 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 184 [2021-06-05 16:04:38,519 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 200 [2021-06-05 16:04:38,935 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 366 [2021-06-05 16:04:40,388 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-06-05 16:04:41,922 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-06-05 16:04:43,621 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 1240 DAG size of output: 1146 [2021-06-05 16:04:45,648 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 1148 DAG size of output: 1682 [2021-06-05 16:04:47,143 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 446 [2021-06-05 16:04:50,140 WARN L205 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 440 DAG size of output: 331 [2021-06-05 16:07:36,726 WARN L205 SmtUtils]: Spent 2.77 m on a formula simplification. DAG size of input: 2100 DAG size of output: 1622 [2021-06-05 16:07:42,921 WARN L205 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 2100 DAG size of output: 1622 [2021-06-05 16:07:51,817 WARN L205 SmtUtils]: Spent 8.88 s on a formula simplification. DAG size of input: 2109 DAG size of output: 1630 [2021-06-05 16:07:55,287 WARN L205 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 130 DAG size of output: 145 [2021-06-05 16:07:57,550 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 167 DAG size of output: 124 [2021-06-05 16:08:58,169 WARN L205 SmtUtils]: Spent 1.01 m on a formula simplification. DAG size of input: 1100 DAG size of output: 1363 [2021-06-05 16:11:28,271 WARN L205 SmtUtils]: Spent 2.48 m on a formula simplification. DAG size of input: 1064 DAG size of output: 527 [2021-06-05 16:11:28,546 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 219 [2021-06-05 16:11:28,860 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 138 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown