/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:13:52,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:13:52,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:13:52,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:13:52,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 06:13:52,891 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:13:52,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:13:52,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:13:52,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:13:52,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:13:52,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:13:52,894 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:13:52,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:13:52,894 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:13:52,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:13:52,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:13:52,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:13:52,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:13:52,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:13:52,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:13:52,895 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:13:52,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:13:52,896 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:13:52,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:13:52,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:13:52,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:13:52,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:13:52,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:13:52,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:13:52,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:13:52,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:13:52,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:13:52,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:13:52,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:13:52,897 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:13:52,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:13:52,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:13:53,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:13:53,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:13:53,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:13:53,151 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:13:53,151 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:13:53,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2021-06-05 06:13:53,152 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2021-06-05 06:13:53,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:13:53,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:13:53,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:13:53,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:13:53,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:13:53,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:53" (1/1) ... [2021-06-05 06:13:53,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:53" (1/1) ... [2021-06-05 06:13:53,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:13:53,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:13:53,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:13:53,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:13:53,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:53" (1/1) ... [2021-06-05 06:13:53,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:53" (1/1) ... [2021-06-05 06:13:53,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:53" (1/1) ... [2021-06-05 06:13:53,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:53" (1/1) ... [2021-06-05 06:13:53,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:53" (1/1) ... [2021-06-05 06:13:53,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:53" (1/1) ... [2021-06-05 06:13:53,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:53" (1/1) ... [2021-06-05 06:13:53,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:13:53,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:13:53,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:13:53,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:13:53,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:13:53,274 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:13:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:13:53,274 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:13:53,274 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:13:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:13:53,274 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:13:53,275 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:13:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:13:53,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:13:53,275 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:13:53,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:13:53,402 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:13:53,404 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:13:53 BoogieIcfgContainer [2021-06-05 06:13:53,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:13:53,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:13:53,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:13:53,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:13:53,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:13:53" (1/2) ... [2021-06-05 06:13:53,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36725152 and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:13:53, skipping insertion in model container [2021-06-05 06:13:53,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:13:53" (2/2) ... [2021-06-05 06:13:53,408 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2021-06-05 06:13:53,412 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:13:53,412 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:13:53,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:13:53,413 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:13:53,433 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 06:13:53,447 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 06:13:53,459 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:13:53,459 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:13:53,459 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:13:53,459 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:13:53,459 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:13:53,459 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:13:53,459 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:13:53,460 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:13:53,465 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2021-06-05 06:13:53,483 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 06:13:53,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:53,489 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:13:53,489 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:53,492 INFO L82 PathProgramCache]: Analyzing trace with hash -281375544, now seen corresponding path program 1 times [2021-06-05 06:13:53,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:53,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562507081] [2021-06-05 06:13:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:53,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:53,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562507081] [2021-06-05 06:13:53,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562507081] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:13:53,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:13:53,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:13:53,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954044013] [2021-06-05 06:13:53,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:13:53,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:53,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:13:53,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:13:53,610 INFO L87 Difference]: Start difference. First operand has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:53,631 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2021-06-05 06:13:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:13:53,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 06:13:53,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:53,637 INFO L225 Difference]: With dead ends: 38 [2021-06-05 06:13:53,637 INFO L226 Difference]: Without dead ends: 38 [2021-06-05 06:13:53,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:13:53,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-06-05 06:13:53,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-06-05 06:13:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2021-06-05 06:13:53,659 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2021-06-05 06:13:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:53,659 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2021-06-05 06:13:53,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2021-06-05 06:13:53,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:13:53,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:53,660 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:13:53,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:13:53,660 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1344639720, now seen corresponding path program 1 times [2021-06-05 06:13:53,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:53,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428425628] [2021-06-05 06:13:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:53,687 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 06:13:53,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:53,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428425628] [2021-06-05 06:13:53,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428425628] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:13:53,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:13:53,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:13:53,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142454050] [2021-06-05 06:13:53,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:13:53,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:53,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:13:53,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:13:53,690 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:53,711 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-06-05 06:13:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:13:53,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:13:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:53,713 INFO L225 Difference]: With dead ends: 62 [2021-06-05 06:13:53,713 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 06:13:53,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:13:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 06:13:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-06-05 06:13:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2021-06-05 06:13:53,721 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2021-06-05 06:13:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:53,721 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2021-06-05 06:13:53,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2021-06-05 06:13:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:13:53,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:53,722 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:13:53,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:13:53,722 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:53,723 INFO L82 PathProgramCache]: Analyzing trace with hash 405244970, now seen corresponding path program 1 times [2021-06-05 06:13:53,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:53,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395329341] [2021-06-05 06:13:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:13:53,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:53,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395329341] [2021-06-05 06:13:53,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395329341] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:13:53,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:13:53,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:13:53,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119162206] [2021-06-05 06:13:53,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:13:53,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:53,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:13:53,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:13:53,770 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:53,795 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2021-06-05 06:13:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:13:53,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:13:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:53,797 INFO L225 Difference]: With dead ends: 87 [2021-06-05 06:13:53,797 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 06:13:53,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:13:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 06:13:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2021-06-05 06:13:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-06-05 06:13:53,809 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2021-06-05 06:13:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:53,809 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-06-05 06:13:53,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-06-05 06:13:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:13:53,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:53,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:13:53,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 06:13:53,810 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:53,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1785950996, now seen corresponding path program 2 times [2021-06-05 06:13:53,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:53,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430132534] [2021-06-05 06:13:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:54,063 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 06:13:54,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:54,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430132534] [2021-06-05 06:13:54,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430132534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:54,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832094157] [2021-06-05 06:13:54,064 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:54,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:13:54,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:13:54,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:54,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832094157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:54,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:54,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:13:54,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900504398] [2021-06-05 06:13:54,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:13:54,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:54,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:13:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:13:54,609 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:54,947 INFO L93 Difference]: Finished difference Result 116 states and 207 transitions. [2021-06-05 06:13:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:13:54,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:13:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:54,952 INFO L225 Difference]: With dead ends: 116 [2021-06-05 06:13:54,952 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 06:13:54,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 554.5ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:13:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 06:13:54,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-06-05 06:13:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 73 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 139 transitions. [2021-06-05 06:13:54,968 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 139 transitions. Word has length 22 [2021-06-05 06:13:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:54,968 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 139 transitions. [2021-06-05 06:13:54,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 139 transitions. [2021-06-05 06:13:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:13:54,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:54,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:13:55,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:55,170 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:55,171 INFO L82 PathProgramCache]: Analyzing trace with hash 828519660, now seen corresponding path program 3 times [2021-06-05 06:13:55,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:55,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540968993] [2021-06-05 06:13:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:55,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:55,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540968993] [2021-06-05 06:13:55,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540968993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:55,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162372997] [2021-06-05 06:13:55,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:55,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:13:55,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:55,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:13:55,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:55,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162372997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:55,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:55,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:13:55,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983348776] [2021-06-05 06:13:55,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:13:55,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:55,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:13:55,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:13:55,898 INFO L87 Difference]: Start difference. First operand 74 states and 139 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:56,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:56,488 INFO L93 Difference]: Finished difference Result 163 states and 299 transitions. [2021-06-05 06:13:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:13:56,489 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:13:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:56,490 INFO L225 Difference]: With dead ends: 163 [2021-06-05 06:13:56,490 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 06:13:56,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 748.2ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:13:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 06:13:56,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 76. [2021-06-05 06:13:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-06-05 06:13:56,508 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-06-05 06:13:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:56,508 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-06-05 06:13:56,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:56,508 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-06-05 06:13:56,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:13:56,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:56,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:13:56,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:56,734 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:56,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:56,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1769874196, now seen corresponding path program 4 times [2021-06-05 06:13:56,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:56,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850482931] [2021-06-05 06:13:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:56,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:56,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850482931] [2021-06-05 06:13:56,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850482931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:56,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072269355] [2021-06-05 06:13:56,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:57,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:13:57,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:13:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:57,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072269355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:57,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:57,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:13:57,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080980144] [2021-06-05 06:13:57,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:13:57,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:57,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:13:57,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:13:57,349 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:58,134 INFO L93 Difference]: Finished difference Result 201 states and 383 transitions. [2021-06-05 06:13:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:13:58,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:13:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:58,135 INFO L225 Difference]: With dead ends: 201 [2021-06-05 06:13:58,135 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 06:13:58,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 806.7ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:13:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 06:13:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 76. [2021-06-05 06:13:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-06-05 06:13:58,139 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-06-05 06:13:58,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:58,139 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-06-05 06:13:58,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-06-05 06:13:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:13:58,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:58,140 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:13:58,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 06:13:58,357 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1242135592, now seen corresponding path program 5 times [2021-06-05 06:13:58,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:58,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867547001] [2021-06-05 06:13:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:58,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:58,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867547001] [2021-06-05 06:13:58,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867547001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:58,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659662694] [2021-06-05 06:13:58,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:58,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:13:58,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:58,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:13:58,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:58,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659662694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:58,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:58,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:13:58,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136570650] [2021-06-05 06:13:58,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:13:58,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:58,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:13:58,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:13:58,815 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:59,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:13:59,231 INFO L93 Difference]: Finished difference Result 144 states and 270 transitions. [2021-06-05 06:13:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:13:59,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:13:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:13:59,233 INFO L225 Difference]: With dead ends: 144 [2021-06-05 06:13:59,233 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 06:13:59,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:13:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 06:13:59,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2021-06-05 06:13:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 89 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 177 transitions. [2021-06-05 06:13:59,236 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 177 transitions. Word has length 22 [2021-06-05 06:13:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:13:59,236 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 177 transitions. [2021-06-05 06:13:59,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:13:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 177 transitions. [2021-06-05 06:13:59,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:13:59,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:13:59,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:13:59,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:59,450 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:13:59,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:13:59,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1356258264, now seen corresponding path program 6 times [2021-06-05 06:13:59,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:13:59,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682304607] [2021-06-05 06:13:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:13:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:13:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:59,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:13:59,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682304607] [2021-06-05 06:13:59,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682304607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:59,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286803058] [2021-06-05 06:13:59,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:13:59,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:13:59,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:13:59,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:13:59,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:13:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:13:59,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286803058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:13:59,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:13:59,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 06:13:59,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814165212] [2021-06-05 06:13:59,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:13:59,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:13:59,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:13:59,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:13:59,886 INFO L87 Difference]: Start difference. First operand 90 states and 177 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:00,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:00,464 INFO L93 Difference]: Finished difference Result 199 states and 389 transitions. [2021-06-05 06:14:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:14:00,465 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:14:00,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:00,465 INFO L225 Difference]: With dead ends: 199 [2021-06-05 06:14:00,465 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 06:14:00,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:14:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 06:14:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 88. [2021-06-05 06:14:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-06-05 06:14:00,468 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-06-05 06:14:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:00,469 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-06-05 06:14:00,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-06-05 06:14:00,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:14:00,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:00,469 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:00,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 06:14:00,681 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:00,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1781598820, now seen corresponding path program 7 times [2021-06-05 06:14:00,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:00,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976526439] [2021-06-05 06:14:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:00,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:00,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976526439] [2021-06-05 06:14:00,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976526439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:00,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716169314] [2021-06-05 06:14:00,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:14:00,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:01,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716169314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:01,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:01,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:14:01,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404849675] [2021-06-05 06:14:01,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:14:01,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:01,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:14:01,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:14:01,084 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:01,418 INFO L93 Difference]: Finished difference Result 172 states and 329 transitions. [2021-06-05 06:14:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:14:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:14:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:01,419 INFO L225 Difference]: With dead ends: 172 [2021-06-05 06:14:01,419 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 06:14:01,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:14:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 06:14:01,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2021-06-05 06:14:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-06-05 06:14:01,421 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-06-05 06:14:01,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:01,422 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-06-05 06:14:01,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:01,422 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-06-05 06:14:01,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:14:01,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:01,422 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:01,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 06:14:01,625 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:01,625 INFO L82 PathProgramCache]: Analyzing trace with hash 449508136, now seen corresponding path program 8 times [2021-06-05 06:14:01,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:01,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432829870] [2021-06-05 06:14:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:01,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:01,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432829870] [2021-06-05 06:14:01,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432829870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:01,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658239802] [2021-06-05 06:14:01,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:01,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:01,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:14:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:02,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658239802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:02,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:02,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:14:02,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215847058] [2021-06-05 06:14:02,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:14:02,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:02,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:14:02,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:14:02,014 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:02,423 INFO L93 Difference]: Finished difference Result 214 states and 410 transitions. [2021-06-05 06:14:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:14:02,423 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:14:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:02,424 INFO L225 Difference]: With dead ends: 214 [2021-06-05 06:14:02,424 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 06:14:02,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 418.0ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:14:02,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 06:14:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 94. [2021-06-05 06:14:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 93 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 183 transitions. [2021-06-05 06:14:02,427 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 183 transitions. Word has length 22 [2021-06-05 06:14:02,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:02,427 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 183 transitions. [2021-06-05 06:14:02,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 183 transitions. [2021-06-05 06:14:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:02,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:02,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:02,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:02,636 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1295303378, now seen corresponding path program 9 times [2021-06-05 06:14:02,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:02,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596820133] [2021-06-05 06:14:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:14:02,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:02,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596820133] [2021-06-05 06:14:02,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596820133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:02,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239527447] [2021-06-05 06:14:02,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:02,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:14:02,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:02,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:02,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:03,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239527447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:03,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:03,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-05 06:14:03,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725119379] [2021-06-05 06:14:03,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:03,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:03,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:03,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:03,089 INFO L87 Difference]: Start difference. First operand 94 states and 183 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:03,384 INFO L93 Difference]: Finished difference Result 186 states and 344 transitions. [2021-06-05 06:14:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:14:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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 24 [2021-06-05 06:14:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:03,386 INFO L225 Difference]: With dead ends: 186 [2021-06-05 06:14:03,386 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 06:14:03,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:14:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 06:14:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2021-06-05 06:14:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 241 transitions. [2021-06-05 06:14:03,389 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 241 transitions. Word has length 24 [2021-06-05 06:14:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:03,389 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 241 transitions. [2021-06-05 06:14:03,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 241 transitions. [2021-06-05 06:14:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:03,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:03,389 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:03,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 06:14:03,607 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:03,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:03,607 INFO L82 PathProgramCache]: Analyzing trace with hash 886879146, now seen corresponding path program 10 times [2021-06-05 06:14:03,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:03,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938493715] [2021-06-05 06:14:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:14:03,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:03,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938493715] [2021-06-05 06:14:03,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938493715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:03,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178088525] [2021-06-05 06:14:03,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:03,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:03,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:04,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178088525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:04,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:04,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-05 06:14:04,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547201264] [2021-06-05 06:14:04,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:04,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:04,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:04,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:04,162 INFO L87 Difference]: Start difference. First operand 123 states and 241 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:04,647 INFO L93 Difference]: Finished difference Result 183 states and 339 transitions. [2021-06-05 06:14:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:14:04,648 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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 24 [2021-06-05 06:14:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:04,648 INFO L225 Difference]: With dead ends: 183 [2021-06-05 06:14:04,648 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 06:14:04,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 691.3ms TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:14:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 06:14:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-06-05 06:14:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-06-05 06:14:04,651 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-06-05 06:14:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:04,652 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-06-05 06:14:04,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-06-05 06:14:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:04,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:04,652 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:04,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 06:14:04,865 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:04,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:04,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1328794322, now seen corresponding path program 11 times [2021-06-05 06:14:04,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:04,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684787192] [2021-06-05 06:14:04,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:14:04,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:04,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684787192] [2021-06-05 06:14:04,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684787192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:04,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443251452] [2021-06-05 06:14:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:04,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:14:04,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:05,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443251452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:05,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:05,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-05 06:14:05,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327554280] [2021-06-05 06:14:05,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:05,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:05,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:05,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:05,460 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:06,196 INFO L93 Difference]: Finished difference Result 196 states and 367 transitions. [2021-06-05 06:14:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:14:06,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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 24 [2021-06-05 06:14:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:06,197 INFO L225 Difference]: With dead ends: 196 [2021-06-05 06:14:06,197 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 06:14:06,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 897.0ms TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:14:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 06:14:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2021-06-05 06:14:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-06-05 06:14:06,200 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-06-05 06:14:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:06,201 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-06-05 06:14:06,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-06-05 06:14:06,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:06,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:06,201 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:06,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:06,408 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:06,409 INFO L82 PathProgramCache]: Analyzing trace with hash -727951854, now seen corresponding path program 12 times [2021-06-05 06:14:06,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:06,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787225478] [2021-06-05 06:14:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:06,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:06,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787225478] [2021-06-05 06:14:06,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787225478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:06,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428104526] [2021-06-05 06:14:06,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:06,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:14:06,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:06,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:14:06,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:06,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428104526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:06,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:06,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:14:06,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766096321] [2021-06-05 06:14:06,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:14:06,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:06,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:14:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:14:06,846 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:07,176 INFO L93 Difference]: Finished difference Result 168 states and 318 transitions. [2021-06-05 06:14:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:14:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 24 [2021-06-05 06:14:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:07,177 INFO L225 Difference]: With dead ends: 168 [2021-06-05 06:14:07,178 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 06:14:07,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:14:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 06:14:07,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2021-06-05 06:14:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.976) internal successors, (247), 125 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 247 transitions. [2021-06-05 06:14:07,180 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 247 transitions. Word has length 24 [2021-06-05 06:14:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:07,180 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 247 transitions. [2021-06-05 06:14:07,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2021-06-05 06:14:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:07,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:07,181 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:07,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 06:14:07,385 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:07,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:07,386 INFO L82 PathProgramCache]: Analyzing trace with hash -966844970, now seen corresponding path program 13 times [2021-06-05 06:14:07,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:07,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851992988] [2021-06-05 06:14:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:07,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:07,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851992988] [2021-06-05 06:14:07,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851992988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:07,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341195982] [2021-06-05 06:14:07,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:14:07,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:07,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341195982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:07,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:07,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:14:07,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443605943] [2021-06-05 06:14:07,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:14:07,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:07,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:14:07,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:14:07,833 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:08,284 INFO L93 Difference]: Finished difference Result 163 states and 308 transitions. [2021-06-05 06:14:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:14:08,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 24 [2021-06-05 06:14:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:08,285 INFO L225 Difference]: With dead ends: 163 [2021-06-05 06:14:08,285 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 06:14:08,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 500.7ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:14:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 06:14:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2021-06-05 06:14:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-06-05 06:14:08,287 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 24 [2021-06-05 06:14:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:08,288 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-06-05 06:14:08,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-06-05 06:14:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:08,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:08,288 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:08,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:08,489 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1813322510, now seen corresponding path program 14 times [2021-06-05 06:14:08,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:08,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319391085] [2021-06-05 06:14:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:08,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:08,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319391085] [2021-06-05 06:14:08,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319391085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:08,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802565296] [2021-06-05 06:14:08,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:08,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:08,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:08,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:14:08,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:09,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802565296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:09,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:09,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 06:14:09,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902188319] [2021-06-05 06:14:09,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:14:09,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:09,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:14:09,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:14:09,094 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:09,609 INFO L93 Difference]: Finished difference Result 277 states and 529 transitions. [2021-06-05 06:14:09,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:14:09,609 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 27 [2021-06-05 06:14:09,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:09,610 INFO L225 Difference]: With dead ends: 277 [2021-06-05 06:14:09,610 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 06:14:09,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 755.8ms TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:14:09,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 06:14:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 154. [2021-06-05 06:14:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.0588235294117645) internal successors, (315), 153 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 315 transitions. [2021-06-05 06:14:09,614 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 315 transitions. Word has length 27 [2021-06-05 06:14:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:09,614 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 315 transitions. [2021-06-05 06:14:09,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 315 transitions. [2021-06-05 06:14:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:09,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:09,614 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:09,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 06:14:09,821 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:09,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:09,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1763754766, now seen corresponding path program 15 times [2021-06-05 06:14:09,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:09,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184836470] [2021-06-05 06:14:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:09,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:09,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184836470] [2021-06-05 06:14:09,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184836470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:09,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605248481] [2021-06-05 06:14:09,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:10,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:14:10,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:10,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:14:10,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:10,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605248481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:10,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:10,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:14:10,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449775850] [2021-06-05 06:14:10,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:14:10,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:10,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:14:10,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:10,398 INFO L87 Difference]: Start difference. First operand 154 states and 315 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:11,577 INFO L93 Difference]: Finished difference Result 345 states and 670 transitions. [2021-06-05 06:14:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:14:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 27 [2021-06-05 06:14:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:11,578 INFO L225 Difference]: With dead ends: 345 [2021-06-05 06:14:11,578 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 06:14:11,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1261.1ms TimeCoverageRelationStatistics Valid=750, Invalid=4220, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:14:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 06:14:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 158. [2021-06-05 06:14:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-06-05 06:14:11,582 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-06-05 06:14:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:11,583 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-06-05 06:14:11,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-06-05 06:14:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:11,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:11,583 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:11,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:11,797 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash 83258126, now seen corresponding path program 16 times [2021-06-05 06:14:11,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:11,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656712320] [2021-06-05 06:14:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:11,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:11,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656712320] [2021-06-05 06:14:11,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656712320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:11,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927002878] [2021-06-05 06:14:11,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:14:11,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:11,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:14:11,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:12,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927002878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:12,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:12,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:14:12,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177246223] [2021-06-05 06:14:12,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:14:12,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:12,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:14:12,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:12,399 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:14,059 INFO L93 Difference]: Finished difference Result 351 states and 699 transitions. [2021-06-05 06:14:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:14:14,059 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 27 [2021-06-05 06:14:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:14,060 INFO L225 Difference]: With dead ends: 351 [2021-06-05 06:14:14,060 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 06:14:14,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 1587.3ms TimeCoverageRelationStatistics Valid=910, Invalid=5252, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:14:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 06:14:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 158. [2021-06-05 06:14:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-06-05 06:14:14,065 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-06-05 06:14:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:14,065 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-06-05 06:14:14,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-06-05 06:14:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:14,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:14,065 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:14,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 06:14:14,281 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:14,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1779831566, now seen corresponding path program 17 times [2021-06-05 06:14:14,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:14,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603924461] [2021-06-05 06:14:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:14,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:14,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603924461] [2021-06-05 06:14:14,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603924461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:14,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653821234] [2021-06-05 06:14:14,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:14,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:14:14,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:14,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:14:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:15,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653821234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:15,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:15,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-06-05 06:14:15,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329398458] [2021-06-05 06:14:15,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:14:15,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:15,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:14:15,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:15,029 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:17,854 INFO L93 Difference]: Finished difference Result 411 states and 807 transitions. [2021-06-05 06:14:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 06:14:17,854 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 27 [2021-06-05 06:14:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:17,855 INFO L225 Difference]: With dead ends: 411 [2021-06-05 06:14:17,855 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 06:14:17,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 2696.6ms TimeCoverageRelationStatistics Valid=1079, Invalid=8041, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 06:14:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 06:14:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 176. [2021-06-05 06:14:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1085714285714285) internal successors, (369), 175 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 369 transitions. [2021-06-05 06:14:17,860 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 369 transitions. Word has length 27 [2021-06-05 06:14:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:17,860 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 369 transitions. [2021-06-05 06:14:17,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 369 transitions. [2021-06-05 06:14:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:17,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:17,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:18,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:18,079 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:18,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1450173818, now seen corresponding path program 18 times [2021-06-05 06:14:18,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:18,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399145407] [2021-06-05 06:14:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:18,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:18,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399145407] [2021-06-05 06:14:18,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399145407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:18,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102591069] [2021-06-05 06:14:18,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:18,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:14:18,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:18,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:18,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:18,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102591069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:18,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:18,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:14:18,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047765107] [2021-06-05 06:14:18,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:14:18,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:18,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:14:18,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:18,703 INFO L87 Difference]: Start difference. First operand 176 states and 369 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:19,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:19,495 INFO L93 Difference]: Finished difference Result 331 states and 647 transitions. [2021-06-05 06:14:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:14:19,496 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 27 [2021-06-05 06:14:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:19,497 INFO L225 Difference]: With dead ends: 331 [2021-06-05 06:14:19,497 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 06:14:19,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 950.6ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:14:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 06:14:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 196. [2021-06-05 06:14:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-06-05 06:14:19,501 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-06-05 06:14:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:19,501 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-06-05 06:14:19,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-06-05 06:14:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:19,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:19,501 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:19,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:19,717 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash 246399622, now seen corresponding path program 19 times [2021-06-05 06:14:19,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:19,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790299861] [2021-06-05 06:14:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:19,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:19,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790299861] [2021-06-05 06:14:19,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790299861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:19,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457584154] [2021-06-05 06:14:19,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:19,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:19,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:20,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457584154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:20,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:20,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 06:14:20,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702031112] [2021-06-05 06:14:20,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:14:20,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:20,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:14:20,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:14:20,308 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:21,574 INFO L93 Difference]: Finished difference Result 389 states and 772 transitions. [2021-06-05 06:14:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:14:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 27 [2021-06-05 06:14:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:21,575 INFO L225 Difference]: With dead ends: 389 [2021-06-05 06:14:21,576 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 06:14:21,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1240.7ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:14:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 06:14:21,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 196. [2021-06-05 06:14:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:21,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-06-05 06:14:21,580 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-06-05 06:14:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:21,580 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-06-05 06:14:21,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-06-05 06:14:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:21,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:21,581 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:21,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 06:14:21,797 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash -910710590, now seen corresponding path program 20 times [2021-06-05 06:14:21,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:21,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447530670] [2021-06-05 06:14:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:21,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:21,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447530670] [2021-06-05 06:14:21,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447530670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:21,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909802772] [2021-06-05 06:14:21,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:21,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:21,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:22,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909802772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:22,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:22,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 06:14:22,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158100178] [2021-06-05 06:14:22,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:14:22,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:22,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:14:22,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:22,381 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:23,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:23,304 INFO L93 Difference]: Finished difference Result 364 states and 719 transitions. [2021-06-05 06:14:23,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:14:23,305 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-06-05 06:14:23,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:23,305 INFO L225 Difference]: With dead ends: 364 [2021-06-05 06:14:23,305 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 06:14:23,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1031.2ms TimeCoverageRelationStatistics Valid=520, Invalid=3020, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:14:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 06:14:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 198. [2021-06-05 06:14:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1370558375634516) internal successors, (421), 197 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 421 transitions. [2021-06-05 06:14:23,310 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 421 transitions. Word has length 27 [2021-06-05 06:14:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:23,310 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 421 transitions. [2021-06-05 06:14:23,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 421 transitions. [2021-06-05 06:14:23,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:23,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:23,310 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:23,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:23,525 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:23,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1689066934, now seen corresponding path program 21 times [2021-06-05 06:14:23,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:23,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23144317] [2021-06-05 06:14:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:23,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:23,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23144317] [2021-06-05 06:14:23,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23144317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:23,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389997005] [2021-06-05 06:14:23,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:23,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:14:23,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:23,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:24,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389997005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:24,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:24,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:14:24,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687907536] [2021-06-05 06:14:24,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:14:24,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:24,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:14:24,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:24,095 INFO L87 Difference]: Start difference. First operand 198 states and 421 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:25,079 INFO L93 Difference]: Finished difference Result 410 states and 841 transitions. [2021-06-05 06:14:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:14:25,080 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 27 [2021-06-05 06:14:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:25,081 INFO L225 Difference]: With dead ends: 410 [2021-06-05 06:14:25,081 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 06:14:25,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1033.1ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:14:25,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 06:14:25,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 258. [2021-06-05 06:14:25,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2140077821011674) internal successors, (569), 257 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 569 transitions. [2021-06-05 06:14:25,085 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 569 transitions. Word has length 27 [2021-06-05 06:14:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:25,085 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 569 transitions. [2021-06-05 06:14:25,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 569 transitions. [2021-06-05 06:14:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:25,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:25,086 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:25,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 06:14:25,302 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:25,302 INFO L82 PathProgramCache]: Analyzing trace with hash 7506506, now seen corresponding path program 22 times [2021-06-05 06:14:25,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:25,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016101081] [2021-06-05 06:14:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:25,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:25,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016101081] [2021-06-05 06:14:25,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016101081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:25,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515228373] [2021-06-05 06:14:25,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:25,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:25,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:25,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:25,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515228373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:25,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:25,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 06:14:25,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001548550] [2021-06-05 06:14:25,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:14:25,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:25,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:14:25,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:14:25,878 INFO L87 Difference]: Start difference. First operand 258 states and 569 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:27,348 INFO L93 Difference]: Finished difference Result 464 states and 961 transitions. [2021-06-05 06:14:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:14:27,349 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 27 [2021-06-05 06:14:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:27,350 INFO L225 Difference]: With dead ends: 464 [2021-06-05 06:14:27,350 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 06:14:27,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1389.8ms TimeCoverageRelationStatistics Valid=803, Invalid=4747, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:14:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 06:14:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 230. [2021-06-05 06:14:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1790393013100435) internal successors, (499), 229 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 06:14:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 499 transitions. [2021-06-05 06:14:27,354 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 499 transitions. Word has length 27 [2021-06-05 06:14:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:27,354 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 499 transitions. [2021-06-05 06:14:27,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:27,355 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 499 transitions. [2021-06-05 06:14:27,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:27,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:27,355 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:27,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:27,564 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:27,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1149603706, now seen corresponding path program 23 times [2021-06-05 06:14:27,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:27,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129861031] [2021-06-05 06:14:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:27,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:27,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129861031] [2021-06-05 06:14:27,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129861031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:27,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486098035] [2021-06-05 06:14:27,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:14:27,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:14:27,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:27,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:27,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:28,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486098035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:28,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:28,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 06:14:28,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160653111] [2021-06-05 06:14:28,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:14:28,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:28,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:14:28,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:28,113 INFO L87 Difference]: Start difference. First operand 230 states and 499 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:29,170 INFO L93 Difference]: Finished difference Result 416 states and 851 transitions. [2021-06-05 06:14:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:14:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-06-05 06:14:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:29,171 INFO L225 Difference]: With dead ends: 416 [2021-06-05 06:14:29,171 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 06:14:29,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1066.1ms TimeCoverageRelationStatistics Valid=585, Invalid=3197, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:14:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 06:14:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 190. [2021-06-05 06:14:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.121693121693122) internal successors, (401), 189 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 401 transitions. [2021-06-05 06:14:29,175 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 401 transitions. Word has length 27 [2021-06-05 06:14:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:29,175 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 401 transitions. [2021-06-05 06:14:29,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 401 transitions. [2021-06-05 06:14:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:29,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:29,175 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:29,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:29,389 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1813272906, now seen corresponding path program 24 times [2021-06-05 06:14:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:29,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881930753] [2021-06-05 06:14:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:29,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:29,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881930753] [2021-06-05 06:14:29,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881930753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:29,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578847778] [2021-06-05 06:14:29,548 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:29,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:14:29,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:29,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:29,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:29,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578847778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:29,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:29,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 06:14:29,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950329384] [2021-06-05 06:14:29,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:14:29,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:29,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:14:29,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:29,918 INFO L87 Difference]: Start difference. First operand 190 states and 401 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:31,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:31,014 INFO L93 Difference]: Finished difference Result 478 states and 964 transitions. [2021-06-05 06:14:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:14:31,014 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-06-05 06:14:31,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:31,015 INFO L225 Difference]: With dead ends: 478 [2021-06-05 06:14:31,015 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 06:14:31,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1102.6ms TimeCoverageRelationStatistics Valid=628, Invalid=3404, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:14:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 06:14:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 184. [2021-06-05 06:14:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1147540983606556) internal successors, (387), 183 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 387 transitions. [2021-06-05 06:14:31,019 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 387 transitions. Word has length 27 [2021-06-05 06:14:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:31,019 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 387 transitions. [2021-06-05 06:14:31,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 387 transitions. [2021-06-05 06:14:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:31,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:31,019 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:31,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 06:14:31,233 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:31,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:31,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1183589754, now seen corresponding path program 25 times [2021-06-05 06:14:31,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:31,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967145237] [2021-06-05 06:14:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:31,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:31,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967145237] [2021-06-05 06:14:31,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967145237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:31,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059874534] [2021-06-05 06:14:31,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:31,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:31,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:31,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059874534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:31,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:31,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 06:14:31,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830092106] [2021-06-05 06:14:31,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:14:31,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:31,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:14:31,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:31,731 INFO L87 Difference]: Start difference. First operand 184 states and 387 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:32,548 INFO L93 Difference]: Finished difference Result 535 states and 1056 transitions. [2021-06-05 06:14:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:14:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-06-05 06:14:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:32,550 INFO L225 Difference]: With dead ends: 535 [2021-06-05 06:14:32,550 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 06:14:32,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 887.2ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:14:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 06:14:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 265. [2021-06-05 06:14:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-06-05 06:14:32,554 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-06-05 06:14:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:32,554 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-06-05 06:14:32,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:32,555 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-06-05 06:14:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:32,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:32,555 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:32,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:32,773 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash 512983686, now seen corresponding path program 26 times [2021-06-05 06:14:32,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:32,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037688477] [2021-06-05 06:14:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:32,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:32,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037688477] [2021-06-05 06:14:32,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037688477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:32,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999824129] [2021-06-05 06:14:32,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:32,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:32,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:32,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:32,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:33,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999824129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:33,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:33,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 06:14:33,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497892047] [2021-06-05 06:14:33,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:14:33,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:33,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:14:33,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:14:33,283 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:34,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:34,776 INFO L93 Difference]: Finished difference Result 600 states and 1200 transitions. [2021-06-05 06:14:34,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:14:34,777 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-06-05 06:14:34,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:34,778 INFO L225 Difference]: With dead ends: 600 [2021-06-05 06:14:34,778 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 06:14:34,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 1384.1ms TimeCoverageRelationStatistics Valid=785, Invalid=4765, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:14:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 06:14:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 265. [2021-06-05 06:14:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-06-05 06:14:34,783 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-06-05 06:14:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:34,783 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-06-05 06:14:34,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-06-05 06:14:34,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:34,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:34,784 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:34,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 06:14:34,997 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:34,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash -644126526, now seen corresponding path program 27 times [2021-06-05 06:14:34,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:34,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671595125] [2021-06-05 06:14:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:35,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:35,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671595125] [2021-06-05 06:14:35,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671595125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:35,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827764234] [2021-06-05 06:14:35,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:35,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:14:35,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:35,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:35,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:35,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827764234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:35,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:35,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 06:14:35,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856012279] [2021-06-05 06:14:35,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:14:35,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:35,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:14:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:14:35,499 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:36,888 INFO L93 Difference]: Finished difference Result 651 states and 1311 transitions. [2021-06-05 06:14:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 06:14:36,888 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-06-05 06:14:36,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:36,890 INFO L225 Difference]: With dead ends: 651 [2021-06-05 06:14:36,890 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 06:14:36,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1307.4ms TimeCoverageRelationStatistics Valid=769, Invalid=4487, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:14:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 06:14:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 263. [2021-06-05 06:14:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.187022900763359) internal successors, (573), 262 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 573 transitions. [2021-06-05 06:14:36,895 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 573 transitions. Word has length 27 [2021-06-05 06:14:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:36,895 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 573 transitions. [2021-06-05 06:14:36,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 573 transitions. [2021-06-05 06:14:36,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:36,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:36,896 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:37,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:37,112 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash -516363890, now seen corresponding path program 28 times [2021-06-05 06:14:37,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:37,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127359024] [2021-06-05 06:14:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:37,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:37,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127359024] [2021-06-05 06:14:37,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127359024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:37,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126684330] [2021-06-05 06:14:37,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:37,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:37,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:37,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:14:37,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:37,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126684330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:37,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:37,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 06:14:37,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779941313] [2021-06-05 06:14:37,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:14:37,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:37,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:14:37,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:37,661 INFO L87 Difference]: Start difference. First operand 263 states and 573 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:38,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:38,108 INFO L93 Difference]: Finished difference Result 387 states and 795 transitions. [2021-06-05 06:14:38,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:14:38,109 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-06-05 06:14:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:38,110 INFO L225 Difference]: With dead ends: 387 [2021-06-05 06:14:38,110 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 06:14:38,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 635.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:14:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 06:14:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 275. [2021-06-05 06:14:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 06:14:38,113 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-06-05 06:14:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:38,114 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 06:14:38,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 06:14:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:38,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:38,114 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:38,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 06:14:38,330 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2098106766, now seen corresponding path program 29 times [2021-06-05 06:14:38,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:38,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392017200] [2021-06-05 06:14:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:38,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:38,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392017200] [2021-06-05 06:14:38,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392017200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:38,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467804438] [2021-06-05 06:14:38,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:38,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:14:38,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:38,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:14:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:38,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467804438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:38,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:38,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 06:14:38,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118854824] [2021-06-05 06:14:38,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:14:38,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:38,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:14:38,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:14:38,911 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:39,642 INFO L93 Difference]: Finished difference Result 462 states and 951 transitions. [2021-06-05 06:14:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:14:39,642 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 27 [2021-06-05 06:14:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:39,644 INFO L225 Difference]: With dead ends: 462 [2021-06-05 06:14:39,644 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 06:14:39,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 901.1ms TimeCoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:14:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 06:14:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 277. [2021-06-05 06:14:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.199275362318841) internal successors, (607), 276 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 607 transitions. [2021-06-05 06:14:39,658 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 607 transitions. Word has length 27 [2021-06-05 06:14:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:39,658 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 607 transitions. [2021-06-05 06:14:39,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 607 transitions. [2021-06-05 06:14:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:39,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:39,658 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:39,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 06:14:39,869 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash -500287090, now seen corresponding path program 30 times [2021-06-05 06:14:39,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:39,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502287277] [2021-06-05 06:14:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:40,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:40,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502287277] [2021-06-05 06:14:40,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502287277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:40,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802679133] [2021-06-05 06:14:40,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:40,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:14:40,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:40,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:14:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:40,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802679133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:40,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:40,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 06:14:40,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713834472] [2021-06-05 06:14:40,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:14:40,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:40,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:14:40,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:14:40,424 INFO L87 Difference]: Start difference. First operand 277 states and 607 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:41,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:41,579 INFO L93 Difference]: Finished difference Result 541 states and 1110 transitions. [2021-06-05 06:14:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:14:41,579 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-06-05 06:14:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:41,581 INFO L225 Difference]: With dead ends: 541 [2021-06-05 06:14:41,581 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 06:14:41,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1145.2ms TimeCoverageRelationStatistics Valid=547, Invalid=3485, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:14:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 06:14:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 275. [2021-06-05 06:14:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 06:14:41,586 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-06-05 06:14:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:41,586 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 06:14:41,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:41,586 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 06:14:41,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:41,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:41,587 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:41,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:41,787 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:41,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:41,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1243781370, now seen corresponding path program 31 times [2021-06-05 06:14:41,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:41,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706393490] [2021-06-05 06:14:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:41,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:41,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706393490] [2021-06-05 06:14:41,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706393490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:41,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210221178] [2021-06-05 06:14:41,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:41,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:41,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:42,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210221178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:42,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:42,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 06:14:42,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082700116] [2021-06-05 06:14:42,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:14:42,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:42,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:14:42,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:14:42,255 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:43,045 INFO L93 Difference]: Finished difference Result 489 states and 1029 transitions. [2021-06-05 06:14:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:14:43,045 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-06-05 06:14:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:43,046 INFO L225 Difference]: With dead ends: 489 [2021-06-05 06:14:43,046 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 06:14:43,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 836.8ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:14:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 06:14:43,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 275. [2021-06-05 06:14:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 06:14:43,050 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-06-05 06:14:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:43,050 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 06:14:43,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 06:14:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:43,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:43,051 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:43,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:43,265 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1179632014, now seen corresponding path program 32 times [2021-06-05 06:14:43,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:43,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406606477] [2021-06-05 06:14:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:43,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:43,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406606477] [2021-06-05 06:14:43,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406606477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:43,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172051274] [2021-06-05 06:14:43,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:14:43,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:43,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:43,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:43,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:43,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172051274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:43,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:43,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 06:14:43,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733339464] [2021-06-05 06:14:43,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:14:43,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:43,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:14:43,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:43,774 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:44,447 INFO L93 Difference]: Finished difference Result 464 states and 973 transitions. [2021-06-05 06:14:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:14:44,448 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-06-05 06:14:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:44,449 INFO L225 Difference]: With dead ends: 464 [2021-06-05 06:14:44,449 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 06:14:44,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 793.4ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:14:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 06:14:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 295. [2021-06-05 06:14:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-06-05 06:14:44,453 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-06-05 06:14:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:44,453 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-06-05 06:14:44,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-06-05 06:14:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:44,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:44,453 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:44,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 06:14:44,669 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:44,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:44,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1418761842, now seen corresponding path program 33 times [2021-06-05 06:14:44,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:44,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834224443] [2021-06-05 06:14:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:44,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:44,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834224443] [2021-06-05 06:14:44,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834224443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:44,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895007169] [2021-06-05 06:14:44,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:44,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:14:44,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:44,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:44,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:45,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895007169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:45,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:45,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 06:14:45,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785781032] [2021-06-05 06:14:45,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:14:45,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:45,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:14:45,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:14:45,171 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:46,347 INFO L93 Difference]: Finished difference Result 569 states and 1201 transitions. [2021-06-05 06:14:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:14:46,347 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-06-05 06:14:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:46,348 INFO L225 Difference]: With dead ends: 569 [2021-06-05 06:14:46,348 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 06:14:46,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1136.1ms TimeCoverageRelationStatistics Valid=549, Invalid=3483, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:14:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 06:14:46,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 295. [2021-06-05 06:14:46,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:46,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-06-05 06:14:46,353 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-06-05 06:14:46,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:46,353 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-06-05 06:14:46,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-06-05 06:14:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:46,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:46,353 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:46,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2021-06-05 06:14:46,570 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:46,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1719095242, now seen corresponding path program 34 times [2021-06-05 06:14:46,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:46,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955977332] [2021-06-05 06:14:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:46,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:46,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955977332] [2021-06-05 06:14:46,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955977332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:46,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114796559] [2021-06-05 06:14:46,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:46,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:46,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:46,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:47,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114796559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:47,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:47,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 06:14:47,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467234728] [2021-06-05 06:14:47,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:14:47,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:47,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:14:47,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:14:47,055 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:47,987 INFO L93 Difference]: Finished difference Result 627 states and 1345 transitions. [2021-06-05 06:14:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:14:47,987 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-06-05 06:14:47,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:47,988 INFO L225 Difference]: With dead ends: 627 [2021-06-05 06:14:47,989 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 06:14:47,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 909.5ms TimeCoverageRelationStatistics Valid=441, Invalid=2529, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:14:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 06:14:47,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 289. [2021-06-05 06:14:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.1979166666666665) internal successors, (633), 288 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 633 transitions. [2021-06-05 06:14:47,993 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 633 transitions. Word has length 27 [2021-06-05 06:14:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:47,993 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 633 transitions. [2021-06-05 06:14:47,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 633 transitions. [2021-06-05 06:14:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:47,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:47,993 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:48,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:48,209 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:48,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2141436106, now seen corresponding path program 35 times [2021-06-05 06:14:48,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:48,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784331791] [2021-06-05 06:14:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:48,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:48,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784331791] [2021-06-05 06:14:48,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784331791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:48,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496881585] [2021-06-05 06:14:48,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:48,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:14:48,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:48,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:14:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:48,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496881585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:48,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:48,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 06:14:48,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122129955] [2021-06-05 06:14:48,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:14:48,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:48,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:14:48,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:48,676 INFO L87 Difference]: Start difference. First operand 289 states and 633 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:49,274 INFO L93 Difference]: Finished difference Result 564 states and 1163 transitions. [2021-06-05 06:14:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:14:49,275 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-06-05 06:14:49,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:49,276 INFO L225 Difference]: With dead ends: 564 [2021-06-05 06:14:49,276 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 06:14:49,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 699.4ms TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:14:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 06:14:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 362. [2021-06-05 06:14:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.224376731301939) internal successors, (803), 361 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 803 transitions. [2021-06-05 06:14:49,281 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 803 transitions. Word has length 27 [2021-06-05 06:14:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:49,281 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 803 transitions. [2021-06-05 06:14:49,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 803 transitions. [2021-06-05 06:14:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:49,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:49,281 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:49,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 06:14:49,497 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:49,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:49,497 INFO L82 PathProgramCache]: Analyzing trace with hash -456957750, now seen corresponding path program 36 times [2021-06-05 06:14:49,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:49,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164071063] [2021-06-05 06:14:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:49,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:49,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164071063] [2021-06-05 06:14:49,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164071063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:49,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172348834] [2021-06-05 06:14:49,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:49,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:14:49,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:49,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:49,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:49,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172348834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:49,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:49,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 06:14:49,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455405195] [2021-06-05 06:14:49,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:14:49,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:49,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:14:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:14:49,972 INFO L87 Difference]: Start difference. First operand 362 states and 803 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:51,390 INFO L93 Difference]: Finished difference Result 680 states and 1421 transitions. [2021-06-05 06:14:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:14:51,390 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-06-05 06:14:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:51,392 INFO L225 Difference]: With dead ends: 680 [2021-06-05 06:14:51,392 INFO L226 Difference]: Without dead ends: 660 [2021-06-05 06:14:51,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1274.8ms TimeCoverageRelationStatistics Valid=687, Invalid=4283, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:14:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-05 06:14:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 376. [2021-06-05 06:14:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-06-05 06:14:51,397 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-06-05 06:14:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:51,398 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-06-05 06:14:51,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-06-05 06:14:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:51,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:51,398 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:51,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 06:14:51,601 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:51,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:51,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1614067962, now seen corresponding path program 37 times [2021-06-05 06:14:51,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:51,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784375602] [2021-06-05 06:14:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:51,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:51,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784375602] [2021-06-05 06:14:51,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784375602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:51,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220044918] [2021-06-05 06:14:51,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:51,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:52,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220044918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:52,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:52,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 06:14:52,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842113791] [2021-06-05 06:14:52,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:14:52,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:52,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:14:52,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:14:52,123 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:53,376 INFO L93 Difference]: Finished difference Result 716 states and 1504 transitions. [2021-06-05 06:14:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:14:53,376 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-06-05 06:14:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:53,378 INFO L225 Difference]: With dead ends: 716 [2021-06-05 06:14:53,378 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 06:14:53,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1166.8ms TimeCoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:14:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 06:14:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 376. [2021-06-05 06:14:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-06-05 06:14:53,383 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-06-05 06:14:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:53,383 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-06-05 06:14:53,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-06-05 06:14:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:53,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:53,384 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:53,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 06:14:53,588 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:53,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1912494094, now seen corresponding path program 38 times [2021-06-05 06:14:53,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:53,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453303202] [2021-06-05 06:14:53,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:53,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:53,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453303202] [2021-06-05 06:14:53,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453303202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:53,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568441812] [2021-06-05 06:14:53,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:53,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:53,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:53,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:53,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:54,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568441812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:54,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:54,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 06:14:54,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202825461] [2021-06-05 06:14:54,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:14:54,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:54,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:14:54,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:14:54,118 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:54,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:54,749 INFO L93 Difference]: Finished difference Result 658 states and 1384 transitions. [2021-06-05 06:14:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:14:54,749 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 27 [2021-06-05 06:14:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:54,751 INFO L225 Difference]: With dead ends: 658 [2021-06-05 06:14:54,751 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 06:14:54,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 706.2ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:14:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 06:14:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 458. [2021-06-05 06:14:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2450765864332602) internal successors, (1026), 457 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1026 transitions. [2021-06-05 06:14:54,756 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1026 transitions. Word has length 27 [2021-06-05 06:14:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:54,757 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1026 transitions. [2021-06-05 06:14:54,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1026 transitions. [2021-06-05 06:14:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:54,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:54,757 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:54,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 06:14:54,965 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash -685899762, now seen corresponding path program 39 times [2021-06-05 06:14:54,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:54,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349421015] [2021-06-05 06:14:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:55,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:55,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349421015] [2021-06-05 06:14:55,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349421015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:55,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544085169] [2021-06-05 06:14:55,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:55,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:14:55,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:55,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:55,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:55,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544085169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:55,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:55,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 06:14:55,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13654178] [2021-06-05 06:14:55,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:14:55,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:55,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:14:55,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:55,472 INFO L87 Difference]: Start difference. First operand 458 states and 1026 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:56,670 INFO L93 Difference]: Finished difference Result 751 states and 1599 transitions. [2021-06-05 06:14:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:14:56,670 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-06-05 06:14:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:56,672 INFO L225 Difference]: With dead ends: 751 [2021-06-05 06:14:56,672 INFO L226 Difference]: Without dead ends: 731 [2021-06-05 06:14:56,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1151.2ms TimeCoverageRelationStatistics Valid=578, Invalid=3454, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:14:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-05 06:14:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 401. [2021-06-05 06:14:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.23) internal successors, (892), 400 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 892 transitions. [2021-06-05 06:14:56,678 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 892 transitions. Word has length 27 [2021-06-05 06:14:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:56,679 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 892 transitions. [2021-06-05 06:14:56,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 892 transitions. [2021-06-05 06:14:56,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:56,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:56,679 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:56,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 06:14:56,887 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:56,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:56,887 INFO L82 PathProgramCache]: Analyzing trace with hash -620373174, now seen corresponding path program 40 times [2021-06-05 06:14:56,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:56,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775064965] [2021-06-05 06:14:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:57,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:57,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775064965] [2021-06-05 06:14:57,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775064965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:57,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238316620] [2021-06-05 06:14:57,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:57,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:57,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:57,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:14:57,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:57,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238316620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:57,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:57,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 06:14:57,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89351820] [2021-06-05 06:14:57,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:14:57,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:57,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:14:57,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:57,360 INFO L87 Difference]: Start difference. First operand 401 states and 892 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:57,942 INFO L93 Difference]: Finished difference Result 681 states and 1412 transitions. [2021-06-05 06:14:57,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:14:57,942 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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 27 [2021-06-05 06:14:57,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:57,944 INFO L225 Difference]: With dead ends: 681 [2021-06-05 06:14:57,944 INFO L226 Difference]: Without dead ends: 667 [2021-06-05 06:14:57,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 629.5ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:14:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-06-05 06:14:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 473. [2021-06-05 06:14:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.266949152542373) internal successors, (1070), 472 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1070 transitions. [2021-06-05 06:14:57,950 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1070 transitions. Word has length 27 [2021-06-05 06:14:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:57,950 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1070 transitions. [2021-06-05 06:14:57,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1070 transitions. [2021-06-05 06:14:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:57,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:57,950 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:58,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:58,157 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:58,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1994097482, now seen corresponding path program 41 times [2021-06-05 06:14:58,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:58,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054713320] [2021-06-05 06:14:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:58,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:58,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054713320] [2021-06-05 06:14:58,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054713320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:58,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502552065] [2021-06-05 06:14:58,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:58,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:14:58,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:58,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:14:58,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:58,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502552065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:58,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:58,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 06:14:58,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077610162] [2021-06-05 06:14:58,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:14:58,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:58,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:14:58,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:14:58,648 INFO L87 Difference]: Start difference. First operand 473 states and 1070 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:59,635 INFO L93 Difference]: Finished difference Result 783 states and 1648 transitions. [2021-06-05 06:14:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:14:59,635 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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 27 [2021-06-05 06:14:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:59,637 INFO L225 Difference]: With dead ends: 783 [2021-06-05 06:14:59,637 INFO L226 Difference]: Without dead ends: 769 [2021-06-05 06:14:59,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1047.9ms TimeCoverageRelationStatistics Valid=501, Invalid=3281, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:14:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-05 06:14:59,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 474. [2021-06-05 06:14:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.2769556025369977) internal successors, (1077), 473 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1077 transitions. [2021-06-05 06:14:59,643 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1077 transitions. Word has length 27 [2021-06-05 06:14:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:59,643 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1077 transitions. [2021-06-05 06:14:59,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1077 transitions. [2021-06-05 06:14:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:59,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:59,644 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:59,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 06:14:59,860 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:59,860 INFO L82 PathProgramCache]: Analyzing trace with hash -604296374, now seen corresponding path program 42 times [2021-06-05 06:14:59,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:59,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82563467] [2021-06-05 06:14:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:00,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:00,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82563467] [2021-06-05 06:15:00,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82563467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:00,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121568095] [2021-06-05 06:15:00,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:00,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:15:00,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:00,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:00,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:00,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121568095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:00,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:00,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 06:15:00,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319418511] [2021-06-05 06:15:00,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:00,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:00,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:00,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:00,337 INFO L87 Difference]: Start difference. First operand 474 states and 1077 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:01,905 INFO L93 Difference]: Finished difference Result 813 states and 1728 transitions. [2021-06-05 06:15:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:15:01,905 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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 27 [2021-06-05 06:15:01,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:01,907 INFO L225 Difference]: With dead ends: 813 [2021-06-05 06:15:01,907 INFO L226 Difference]: Without dead ends: 777 [2021-06-05 06:15:01,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1377.2ms TimeCoverageRelationStatistics Valid=700, Invalid=4556, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:15:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-05 06:15:01,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 467. [2021-06-05 06:15:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.2618025751072963) internal successors, (1054), 466 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1054 transitions. [2021-06-05 06:15:01,915 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1054 transitions. Word has length 27 [2021-06-05 06:15:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:01,915 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1054 transitions. [2021-06-05 06:15:01,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1054 transitions. [2021-06-05 06:15:01,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:01,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:01,915 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:02,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:02,118 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:02,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:02,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1347790654, now seen corresponding path program 43 times [2021-06-05 06:15:02,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:02,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610768234] [2021-06-05 06:15:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:02,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:02,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610768234] [2021-06-05 06:15:02,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610768234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:02,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054666281] [2021-06-05 06:15:02,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:15:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:02,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054666281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:02,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:02,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 06:15:02,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977761386] [2021-06-05 06:15:02,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:02,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:02,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:02,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:02,678 INFO L87 Difference]: Start difference. First operand 467 states and 1054 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:03,445 INFO L93 Difference]: Finished difference Result 765 states and 1611 transitions. [2021-06-05 06:15:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:15:03,445 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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 27 [2021-06-05 06:15:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:03,447 INFO L225 Difference]: With dead ends: 765 [2021-06-05 06:15:03,447 INFO L226 Difference]: Without dead ends: 739 [2021-06-05 06:15:03,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 804.5ms TimeCoverageRelationStatistics Valid=410, Invalid=1660, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:15:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-06-05 06:15:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 506. [2021-06-05 06:15:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.257425742574257) internal successors, (1140), 505 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1140 transitions. [2021-06-05 06:15:03,454 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1140 transitions. Word has length 27 [2021-06-05 06:15:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:03,454 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1140 transitions. [2021-06-05 06:15:03,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1140 transitions. [2021-06-05 06:15:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:03,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:03,455 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:03,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 06:15:03,658 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:03,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1615085958, now seen corresponding path program 44 times [2021-06-05 06:15:03,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:03,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046114842] [2021-06-05 06:15:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:03,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:03,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046114842] [2021-06-05 06:15:03,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046114842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:03,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626166529] [2021-06-05 06:15:03,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:03,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:03,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:03,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:15:03,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:04,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626166529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:04,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:04,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 06:15:04,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057822771] [2021-06-05 06:15:04,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:04,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:04,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:04,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:04,311 INFO L87 Difference]: Start difference. First operand 506 states and 1140 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:05,358 INFO L93 Difference]: Finished difference Result 878 states and 1897 transitions. [2021-06-05 06:15:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:15:05,359 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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 27 [2021-06-05 06:15:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:05,361 INFO L225 Difference]: With dead ends: 878 [2021-06-05 06:15:05,361 INFO L226 Difference]: Without dead ends: 842 [2021-06-05 06:15:05,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1128.1ms TimeCoverageRelationStatistics Valid=515, Invalid=2241, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:15:05,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-06-05 06:15:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 455. [2021-06-05 06:15:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.251101321585903) internal successors, (1022), 454 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1022 transitions. [2021-06-05 06:15:05,367 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1022 transitions. Word has length 27 [2021-06-05 06:15:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:05,367 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1022 transitions. [2021-06-05 06:15:05,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1022 transitions. [2021-06-05 06:15:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:05,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:05,368 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:05,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:05,584 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:05,584 INFO L82 PathProgramCache]: Analyzing trace with hash -735982520, now seen corresponding path program 45 times [2021-06-05 06:15:05,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:05,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319375014] [2021-06-05 06:15:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:05,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:05,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319375014] [2021-06-05 06:15:05,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319375014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:05,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668035372] [2021-06-05 06:15:05,771 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:05,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:15:05,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:05,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:15:05,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:06,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668035372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:06,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:06,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 06:15:06,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551347228] [2021-06-05 06:15:06,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:15:06,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:06,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:15:06,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:15:06,184 INFO L87 Difference]: Start difference. First operand 455 states and 1022 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 06:15:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:07,151 INFO L93 Difference]: Finished difference Result 619 states and 1331 transitions. [2021-06-05 06:15:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:15:07,151 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 29 [2021-06-05 06:15:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:07,153 INFO L225 Difference]: With dead ends: 619 [2021-06-05 06:15:07,153 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 06:15:07,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 987.3ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:15:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 06:15:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 500. [2021-06-05 06:15:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.1983967935871744) internal successors, (1097), 499 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1097 transitions. [2021-06-05 06:15:07,159 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1097 transitions. Word has length 29 [2021-06-05 06:15:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:07,159 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1097 transitions. [2021-06-05 06:15:07,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 06:15:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1097 transitions. [2021-06-05 06:15:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:07,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:07,159 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:07,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 06:15:07,368 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:07,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:07,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1495767748, now seen corresponding path program 46 times [2021-06-05 06:15:07,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:07,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000074014] [2021-06-05 06:15:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:07,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:07,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000074014] [2021-06-05 06:15:07,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000074014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:07,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859610849] [2021-06-05 06:15:07,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:07,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:07,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:07,565 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:15:07,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:07,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859610849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:07,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:07,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 06:15:07,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183236926] [2021-06-05 06:15:07,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:15:07,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:07,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:15:07,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:15:07,931 INFO L87 Difference]: Start difference. First operand 500 states and 1097 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 06:15:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:08,882 INFO L93 Difference]: Finished difference Result 591 states and 1253 transitions. [2021-06-05 06:15:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:15:08,882 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 29 [2021-06-05 06:15:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:08,883 INFO L225 Difference]: With dead ends: 591 [2021-06-05 06:15:08,883 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 06:15:08,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1070.6ms TimeCoverageRelationStatistics Valid=411, Invalid=2781, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:15:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 06:15:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 503. [2021-06-05 06:15:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.195219123505976) internal successors, (1102), 502 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1102 transitions. [2021-06-05 06:15:08,889 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1102 transitions. Word has length 29 [2021-06-05 06:15:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:08,889 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1102 transitions. [2021-06-05 06:15:08,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 06:15:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1102 transitions. [2021-06-05 06:15:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:08,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:08,890 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:09,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 06:15:09,090 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:09,091 INFO L82 PathProgramCache]: Analyzing trace with hash -719905720, now seen corresponding path program 47 times [2021-06-05 06:15:09,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:09,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503084844] [2021-06-05 06:15:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:09,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:09,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503084844] [2021-06-05 06:15:09,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503084844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:09,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046601979] [2021-06-05 06:15:09,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:09,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:15:09,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:09,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:15:09,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:09,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046601979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:09,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:09,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 06:15:09,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215737462] [2021-06-05 06:15:09,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:15:09,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:09,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:15:09,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:15:09,669 INFO L87 Difference]: Start difference. First operand 503 states and 1102 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 06:15:10,924 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-06-05 06:15:11,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:11,106 INFO L93 Difference]: Finished difference Result 627 states and 1326 transitions. [2021-06-05 06:15:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:15:11,106 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 29 [2021-06-05 06:15:11,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:11,108 INFO L225 Difference]: With dead ends: 627 [2021-06-05 06:15:11,108 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 06:15:11,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1312.3ms TimeCoverageRelationStatistics Valid=555, Invalid=3351, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:15:11,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 06:15:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 485. [2021-06-05 06:15:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.2024793388429753) internal successors, (1066), 484 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1066 transitions. [2021-06-05 06:15:11,114 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1066 transitions. Word has length 29 [2021-06-05 06:15:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:11,114 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1066 transitions. [2021-06-05 06:15:11,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 06:15:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1066 transitions. [2021-06-05 06:15:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:11,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:11,115 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:11,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 06:15:11,315 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:11,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:11,324 INFO L82 PathProgramCache]: Analyzing trace with hash -682384688, now seen corresponding path program 48 times [2021-06-05 06:15:11,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:11,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978424334] [2021-06-05 06:15:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:15:11,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:11,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978424334] [2021-06-05 06:15:11,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978424334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:11,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254778685] [2021-06-05 06:15:11,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:11,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:15:11,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:11,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:15:11,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:11,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254778685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:11,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:11,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 06:15:11,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951906401] [2021-06-05 06:15:11,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:15:11,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:11,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:15:11,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:11,946 INFO L87 Difference]: Start difference. First operand 485 states and 1066 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:12,763 INFO L93 Difference]: Finished difference Result 685 states and 1451 transitions. [2021-06-05 06:15:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:15:12,764 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 29 [2021-06-05 06:15:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:12,765 INFO L225 Difference]: With dead ends: 685 [2021-06-05 06:15:12,765 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 06:15:12,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 981.2ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:15:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 06:15:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 525. [2021-06-05 06:15:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.1946564885496183) internal successors, (1150), 524 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1150 transitions. [2021-06-05 06:15:12,771 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1150 transitions. Word has length 29 [2021-06-05 06:15:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:12,771 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1150 transitions. [2021-06-05 06:15:12,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1150 transitions. [2021-06-05 06:15:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:12,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:12,772 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:12,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:12,982 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:12,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:12,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1499797836, now seen corresponding path program 49 times [2021-06-05 06:15:12,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:12,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149700284] [2021-06-05 06:15:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:13,685 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 06:15:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:15:13,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:13,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149700284] [2021-06-05 06:15:13,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149700284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:13,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315679640] [2021-06-05 06:15:13,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:13,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:15:13,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:14,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315679640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:14,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:14,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 06:15:14,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326693661] [2021-06-05 06:15:14,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:15:14,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:14,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:15:14,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:14,302 INFO L87 Difference]: Start difference. First operand 525 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:15,500 INFO L93 Difference]: Finished difference Result 696 states and 1471 transitions. [2021-06-05 06:15:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:15:15,500 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 29 [2021-06-05 06:15:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:15,502 INFO L225 Difference]: With dead ends: 696 [2021-06-05 06:15:15,502 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 06:15:15,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2003.2ms TimeCoverageRelationStatistics Valid=522, Invalid=3510, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:15:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 06:15:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 528. [2021-06-05 06:15:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.1916508538899433) internal successors, (1155), 527 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1155 transitions. [2021-06-05 06:15:15,508 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1155 transitions. Word has length 29 [2021-06-05 06:15:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:15,508 INFO L482 AbstractCegarLoop]: Abstraction has 528 states and 1155 transitions. [2021-06-05 06:15:15,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1155 transitions. [2021-06-05 06:15:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:15,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:15,509 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:15,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:15,709 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:15,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:15,709 INFO L82 PathProgramCache]: Analyzing trace with hash -715875632, now seen corresponding path program 50 times [2021-06-05 06:15:15,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:15,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570463714] [2021-06-05 06:15:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:15:15,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:15,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570463714] [2021-06-05 06:15:15,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570463714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:15,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729667253] [2021-06-05 06:15:15,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:15,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:15,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:15,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:15:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:16,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729667253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:16,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:16,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 06:15:16,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368124186] [2021-06-05 06:15:16,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:15:16,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:16,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:15:16,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:16,315 INFO L87 Difference]: Start difference. First operand 528 states and 1155 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:17,682 INFO L93 Difference]: Finished difference Result 739 states and 1557 transitions. [2021-06-05 06:15:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:15:17,683 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 29 [2021-06-05 06:15:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:17,684 INFO L225 Difference]: With dead ends: 739 [2021-06-05 06:15:17,684 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 06:15:17,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1364.2ms TimeCoverageRelationStatistics Valid=657, Invalid=3633, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:15:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 06:15:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 511. [2021-06-05 06:15:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.1921568627450982) internal successors, (1118), 510 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1118 transitions. [2021-06-05 06:15:17,690 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1118 transitions. Word has length 29 [2021-06-05 06:15:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:17,690 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1118 transitions. [2021-06-05 06:15:17,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1118 transitions. [2021-06-05 06:15:17,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:17,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:17,691 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:17,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:17,897 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:17,897 INFO L82 PathProgramCache]: Analyzing trace with hash -353926280, now seen corresponding path program 51 times [2021-06-05 06:15:17,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:17,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110869874] [2021-06-05 06:15:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:18,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:18,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110869874] [2021-06-05 06:15:18,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110869874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:18,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665680025] [2021-06-05 06:15:18,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:15:18,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:15:18,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:18,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:15:18,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:18,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665680025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:18,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:18,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 06:15:18,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837788626] [2021-06-05 06:15:18,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:15:18,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:15:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:15:18,559 INFO L87 Difference]: Start difference. First operand 511 states and 1118 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 06:15:19,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:19,524 INFO L93 Difference]: Finished difference Result 724 states and 1531 transitions. [2021-06-05 06:15:19,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:15:19,524 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 29 [2021-06-05 06:15:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:19,525 INFO L225 Difference]: With dead ends: 724 [2021-06-05 06:15:19,525 INFO L226 Difference]: Without dead ends: 647 [2021-06-05 06:15:19,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1050.4ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:15:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-05 06:15:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 527. [2021-06-05 06:15:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.1863117870722433) internal successors, (1150), 526 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:19,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1150 transitions. [2021-06-05 06:15:19,531 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1150 transitions. Word has length 29 [2021-06-05 06:15:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:19,531 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1150 transitions. [2021-06-05 06:15:19,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 06:15:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1150 transitions. [2021-06-05 06:15:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:19,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:19,532 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:19,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:19,732 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:19,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2048232520, now seen corresponding path program 52 times [2021-06-05 06:15:19,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:19,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176230069] [2021-06-05 06:15:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:19,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:19,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176230069] [2021-06-05 06:15:19,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176230069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:19,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039958176] [2021-06-05 06:15:19,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:19,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:19,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:19,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:15:19,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:20,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039958176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:20,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:20,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 06:15:20,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615487473] [2021-06-05 06:15:20,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:15:20,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:15:20,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:20,272 INFO L87 Difference]: Start difference. First operand 527 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 06:15:21,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:21,140 INFO L93 Difference]: Finished difference Result 754 states and 1604 transitions. [2021-06-05 06:15:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:15:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 29 [2021-06-05 06:15:21,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:21,141 INFO L225 Difference]: With dead ends: 754 [2021-06-05 06:15:21,141 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 06:15:21,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 952.0ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:15:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 06:15:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 611. [2021-06-05 06:15:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.181967213114754) internal successors, (1331), 610 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1331 transitions. [2021-06-05 06:15:21,147 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1331 transitions. Word has length 29 [2021-06-05 06:15:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:21,147 INFO L482 AbstractCegarLoop]: Abstraction has 611 states and 1331 transitions. [2021-06-05 06:15:21,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 06:15:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1331 transitions. [2021-06-05 06:15:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:21,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:21,148 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:21,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 06:15:21,358 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:21,358 INFO L82 PathProgramCache]: Analyzing trace with hash -14984508, now seen corresponding path program 53 times [2021-06-05 06:15:21,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:21,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741141594] [2021-06-05 06:15:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:21,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:21,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741141594] [2021-06-05 06:15:21,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741141594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:21,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124239152] [2021-06-05 06:15:21,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:21,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:15:21,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:21,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:15:21,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:22,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124239152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:22,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:22,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:15:22,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330048671] [2021-06-05 06:15:22,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:15:22,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:22,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:15:22,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:15:22,165 INFO L87 Difference]: Start difference. First operand 611 states and 1331 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 06:15:23,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:23,892 INFO L93 Difference]: Finished difference Result 840 states and 1779 transitions. [2021-06-05 06:15:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:15:23,892 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 29 [2021-06-05 06:15:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:23,893 INFO L225 Difference]: With dead ends: 840 [2021-06-05 06:15:23,894 INFO L226 Difference]: Without dead ends: 818 [2021-06-05 06:15:23,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1919.9ms TimeCoverageRelationStatistics Valid=598, Invalid=4232, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:15:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-06-05 06:15:23,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 654. [2021-06-05 06:15:23,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.1852986217457886) internal successors, (1427), 653 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1427 transitions. [2021-06-05 06:15:23,900 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1427 transitions. Word has length 29 [2021-06-05 06:15:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:23,901 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 1427 transitions. [2021-06-05 06:15:23,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 06:15:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1427 transitions. [2021-06-05 06:15:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:23,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:23,901 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:24,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:24,102 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:24,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:24,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2064309320, now seen corresponding path program 54 times [2021-06-05 06:15:24,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:24,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515082083] [2021-06-05 06:15:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:24,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:24,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515082083] [2021-06-05 06:15:24,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515082083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:24,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756812447] [2021-06-05 06:15:24,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:24,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:15:24,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:24,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:15:24,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:24,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756812447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:24,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:24,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 06:15:24,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968969174] [2021-06-05 06:15:24,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:15:24,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:24,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:15:24,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:24,687 INFO L87 Difference]: Start difference. First operand 654 states and 1427 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 06:15:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:26,394 INFO L93 Difference]: Finished difference Result 877 states and 1853 transitions. [2021-06-05 06:15:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:15:26,395 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 29 [2021-06-05 06:15:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:26,396 INFO L225 Difference]: With dead ends: 877 [2021-06-05 06:15:26,396 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 06:15:26,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 1682.4ms TimeCoverageRelationStatistics Valid=841, Invalid=4859, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:15:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 06:15:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 593. [2021-06-05 06:15:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.1655405405405403) internal successors, (1282), 592 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1282 transitions. [2021-06-05 06:15:26,404 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1282 transitions. Word has length 29 [2021-06-05 06:15:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:26,404 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1282 transitions. [2021-06-05 06:15:26,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 06:15:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1282 transitions. [2021-06-05 06:15:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:26,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:26,405 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:26,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-05 06:15:26,605 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:26,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:26,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1014858316, now seen corresponding path program 55 times [2021-06-05 06:15:26,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:26,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232435454] [2021-06-05 06:15:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:26,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232435454] [2021-06-05 06:15:26,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232435454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828621720] [2021-06-05 06:15:26,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:26,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:26,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:27,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828621720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:27,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:27,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 06:15:27,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275462915] [2021-06-05 06:15:27,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:27,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:27,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:27,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:27,263 INFO L87 Difference]: Start difference. First operand 593 states and 1282 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 06:15:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:28,070 INFO L93 Difference]: Finished difference Result 753 states and 1591 transitions. [2021-06-05 06:15:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:15:28,070 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 29 [2021-06-05 06:15:28,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:28,071 INFO L225 Difference]: With dead ends: 753 [2021-06-05 06:15:28,071 INFO L226 Difference]: Without dead ends: 731 [2021-06-05 06:15:28,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 964.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:15:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-05 06:15:28,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 618. [2021-06-05 06:15:28,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 2.1620745542949757) internal successors, (1334), 617 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1334 transitions. [2021-06-05 06:15:28,078 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1334 transitions. Word has length 29 [2021-06-05 06:15:28,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:28,078 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 1334 transitions. [2021-06-05 06:15:28,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 06:15:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1334 transitions. [2021-06-05 06:15:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:28,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:28,079 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:28,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 06:15:28,297 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1064435512, now seen corresponding path program 56 times [2021-06-05 06:15:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:28,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050009993] [2021-06-05 06:15:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:28,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:28,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050009993] [2021-06-05 06:15:28,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050009993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:28,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511897372] [2021-06-05 06:15:28,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:28,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:28,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:28,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:28,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:28,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511897372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:28,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:28,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 06:15:28,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849616472] [2021-06-05 06:15:28,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:28,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:28,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:28,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:28,921 INFO L87 Difference]: Start difference. First operand 618 states and 1334 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 06:15:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:29,813 INFO L93 Difference]: Finished difference Result 872 states and 1845 transitions. [2021-06-05 06:15:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:15:29,814 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 29 [2021-06-05 06:15:29,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:29,815 INFO L225 Difference]: With dead ends: 872 [2021-06-05 06:15:29,815 INFO L226 Difference]: Without dead ends: 839 [2021-06-05 06:15:29,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1001.1ms TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:15:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-05 06:15:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 617. [2021-06-05 06:15:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.1623376623376624) internal successors, (1332), 616 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1332 transitions. [2021-06-05 06:15:29,822 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1332 transitions. Word has length 29 [2021-06-05 06:15:29,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:29,822 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 1332 transitions. [2021-06-05 06:15:29,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 06:15:29,822 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1332 transitions. [2021-06-05 06:15:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:29,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:29,823 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:30,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:30,037 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:30,037 INFO L82 PathProgramCache]: Analyzing trace with hash -11275644, now seen corresponding path program 57 times [2021-06-05 06:15:30,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:30,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106022271] [2021-06-05 06:15:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:30,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:30,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106022271] [2021-06-05 06:15:30,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106022271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:30,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3200549] [2021-06-05 06:15:30,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:30,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:15:30,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:30,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:30,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3200549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:30,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:30,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 06:15:30,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86779778] [2021-06-05 06:15:30,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:30,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:30,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:30,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:30,678 INFO L87 Difference]: Start difference. First operand 617 states and 1332 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 06:15:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:31,524 INFO L93 Difference]: Finished difference Result 1003 states and 2135 transitions. [2021-06-05 06:15:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:15:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 29 [2021-06-05 06:15:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:31,526 INFO L225 Difference]: With dead ends: 1003 [2021-06-05 06:15:31,526 INFO L226 Difference]: Without dead ends: 970 [2021-06-05 06:15:31,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1020.7ms TimeCoverageRelationStatistics Valid=330, Invalid=2120, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:15:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-06-05 06:15:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 603. [2021-06-05 06:15:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.1627906976744184) internal successors, (1302), 602 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1302 transitions. [2021-06-05 06:15:31,533 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1302 transitions. Word has length 29 [2021-06-05 06:15:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:31,533 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 1302 transitions. [2021-06-05 06:15:31,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 06:15:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1302 transitions. [2021-06-05 06:15:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:31,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:31,534 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:31,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:31,745 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:31,745 INFO L82 PathProgramCache]: Analyzing trace with hash -992806576, now seen corresponding path program 58 times [2021-06-05 06:15:31,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:31,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920299923] [2021-06-05 06:15:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:15:31,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:31,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920299923] [2021-06-05 06:15:31,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920299923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:31,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765772823] [2021-06-05 06:15:31,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:31,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:31,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:31,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:15:31,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:32,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765772823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:32,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:32,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 06:15:32,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378281541] [2021-06-05 06:15:32,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:15:32,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:32,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:15:32,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:32,295 INFO L87 Difference]: Start difference. First operand 603 states and 1302 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:33,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:33,041 INFO L93 Difference]: Finished difference Result 675 states and 1425 transitions. [2021-06-05 06:15:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:15:33,041 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 29 [2021-06-05 06:15:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:33,042 INFO L225 Difference]: With dead ends: 675 [2021-06-05 06:15:33,042 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 06:15:33,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 890.1ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:15:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 06:15:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 576. [2021-06-05 06:15:33,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.017391304347826) internal successors, (1160), 575 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1160 transitions. [2021-06-05 06:15:33,047 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1160 transitions. Word has length 29 [2021-06-05 06:15:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:33,048 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1160 transitions. [2021-06-05 06:15:33,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1160 transitions. [2021-06-05 06:15:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:33,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:33,048 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:33,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:33,249 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:33,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1189375948, now seen corresponding path program 59 times [2021-06-05 06:15:33,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:33,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336758549] [2021-06-05 06:15:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:15:33,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:33,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336758549] [2021-06-05 06:15:33,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336758549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:33,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454946190] [2021-06-05 06:15:33,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:33,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:15:33,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:33,517 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:15:33,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:33,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454946190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:33,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:33,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 06:15:33,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818803307] [2021-06-05 06:15:33,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:15:33,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:33,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:15:33,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:33,920 INFO L87 Difference]: Start difference. First operand 576 states and 1160 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:35,130 INFO L93 Difference]: Finished difference Result 703 states and 1407 transitions. [2021-06-05 06:15:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:15:35,131 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 29 [2021-06-05 06:15:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:35,132 INFO L225 Difference]: With dead ends: 703 [2021-06-05 06:15:35,132 INFO L226 Difference]: Without dead ends: 679 [2021-06-05 06:15:35,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 1398.0ms TimeCoverageRelationStatistics Valid=540, Invalid=3750, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:15:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-05 06:15:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 583. [2021-06-05 06:15:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.0051546391752577) internal successors, (1167), 582 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1167 transitions. [2021-06-05 06:15:35,138 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1167 transitions. Word has length 29 [2021-06-05 06:15:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:35,138 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1167 transitions. [2021-06-05 06:15:35,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1167 transitions. [2021-06-05 06:15:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:35,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:35,138 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:35,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 06:15:35,339 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:35,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1026297520, now seen corresponding path program 60 times [2021-06-05 06:15:35,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:35,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056273793] [2021-06-05 06:15:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:15:35,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:35,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056273793] [2021-06-05 06:15:35,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056273793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:35,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170396532] [2021-06-05 06:15:35,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:35,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:15:35,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:35,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:15:35,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:35,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170396532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:35,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:35,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 06:15:35,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888581908] [2021-06-05 06:15:35,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:15:35,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:35,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:15:35,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:35,913 INFO L87 Difference]: Start difference. First operand 583 states and 1167 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:37,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:37,448 INFO L93 Difference]: Finished difference Result 756 states and 1505 transitions. [2021-06-05 06:15:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:15:37,450 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 29 [2021-06-05 06:15:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:37,451 INFO L225 Difference]: With dead ends: 756 [2021-06-05 06:15:37,451 INFO L226 Difference]: Without dead ends: 730 [2021-06-05 06:15:37,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1484.5ms TimeCoverageRelationStatistics Valid=617, Invalid=3939, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:15:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-06-05 06:15:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 457. [2021-06-05 06:15:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.9956140350877194) internal successors, (910), 456 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 910 transitions. [2021-06-05 06:15:37,456 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 910 transitions. Word has length 29 [2021-06-05 06:15:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:37,456 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 910 transitions. [2021-06-05 06:15:37,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 06:15:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 910 transitions. [2021-06-05 06:15:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:37,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:37,457 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:37,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 06:15:37,657 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:37,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:37,657 INFO L82 PathProgramCache]: Analyzing trace with hash -664348168, now seen corresponding path program 61 times [2021-06-05 06:15:37,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:37,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391696996] [2021-06-05 06:15:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:37,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:37,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391696996] [2021-06-05 06:15:37,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391696996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:37,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861962494] [2021-06-05 06:15:37,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:37,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:15:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:38,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861962494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:38,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:38,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 06:15:38,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600650882] [2021-06-05 06:15:38,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:38,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:38,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:38,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:38,267 INFO L87 Difference]: Start difference. First operand 457 states and 910 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 06:15:38,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:38,968 INFO L93 Difference]: Finished difference Result 708 states and 1404 transitions. [2021-06-05 06:15:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:15:38,968 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 29 [2021-06-05 06:15:38,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:38,969 INFO L225 Difference]: With dead ends: 708 [2021-06-05 06:15:38,969 INFO L226 Difference]: Without dead ends: 683 [2021-06-05 06:15:38,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 915.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:15:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-05 06:15:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 517. [2021-06-05 06:15:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.996124031007752) internal successors, (1030), 516 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1030 transitions. [2021-06-05 06:15:38,974 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1030 transitions. Word has length 29 [2021-06-05 06:15:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:38,974 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1030 transitions. [2021-06-05 06:15:38,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 06:15:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1030 transitions. [2021-06-05 06:15:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:38,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:38,975 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:39,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 06:15:39,193 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:39,193 INFO L82 PathProgramCache]: Analyzing trace with hash 211415604, now seen corresponding path program 62 times [2021-06-05 06:15:39,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:39,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945720836] [2021-06-05 06:15:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:39,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:39,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945720836] [2021-06-05 06:15:39,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945720836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:39,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492529491] [2021-06-05 06:15:39,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:15:39,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:39,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:39,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:15:39,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:39,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492529491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:39,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:39,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 06:15:39,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961750293] [2021-06-05 06:15:39,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:39,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:39,798 INFO L87 Difference]: Start difference. First operand 517 states and 1030 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 06:15:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:40,729 INFO L93 Difference]: Finished difference Result 722 states and 1434 transitions. [2021-06-05 06:15:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:15:40,729 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 29 [2021-06-05 06:15:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:40,730 INFO L225 Difference]: With dead ends: 722 [2021-06-05 06:15:40,730 INFO L226 Difference]: Without dead ends: 693 [2021-06-05 06:15:40,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1125.7ms TimeCoverageRelationStatistics Valid=356, Invalid=2614, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:15:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-06-05 06:15:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 303. [2021-06-05 06:15:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 302 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 598 transitions. [2021-06-05 06:15:40,734 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 598 transitions. Word has length 29 [2021-06-05 06:15:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:40,734 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 598 transitions. [2021-06-05 06:15:40,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 06:15:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 598 transitions. [2021-06-05 06:15:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:40,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:40,734 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:40,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:40,945 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash -758525832, now seen corresponding path program 63 times [2021-06-05 06:15:40,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:40,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724765654] [2021-06-05 06:15:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:41,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:41,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724765654] [2021-06-05 06:15:41,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724765654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:41,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602510110] [2021-06-05 06:15:41,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:41,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:15:41,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:41,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:15:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:41,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602510110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:41,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:41,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 06:15:41,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236514797] [2021-06-05 06:15:41,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:15:41,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:41,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:15:41,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:15:41,599 INFO L87 Difference]: Start difference. First operand 303 states and 598 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 06:15:42,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:42,547 INFO L93 Difference]: Finished difference Result 368 states and 721 transitions. [2021-06-05 06:15:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:15:42,547 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 29 [2021-06-05 06:15:42,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:42,548 INFO L225 Difference]: With dead ends: 368 [2021-06-05 06:15:42,548 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 06:15:42,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1167.9ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:15:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 06:15:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 06:15:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 06:15:42,548 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-06-05 06:15:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:42,548 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 06:15:42,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 06:15:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 06:15:42,548 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 06:15:42,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 06:15:42,750 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:15:42,752 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:15:42 BasicIcfg [2021-06-05 06:15:42,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:15:42,753 INFO L168 Benchmark]: Toolchain (without parser) took 109575.74 ms. Allocated memory was 343.9 MB in the beginning and 497.0 MB in the end (delta: 153.1 MB). Free memory was 323.6 MB in the beginning and 386.6 MB in the end (delta: -63.0 MB). Peak memory consumption was 93.3 MB. Max. memory is 16.0 GB. [2021-06-05 06:15:42,753 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 343.9 MB. Free memory is still 324.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:15:42,753 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.64 ms. Allocated memory is still 343.9 MB. Free memory was 323.4 MB in the beginning and 322.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:15:42,753 INFO L168 Benchmark]: Boogie Preprocessor took 12.37 ms. Allocated memory is still 343.9 MB. Free memory was 322.0 MB in the beginning and 321.1 MB in the end (delta: 982.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:15:42,753 INFO L168 Benchmark]: RCFGBuilder took 191.80 ms. Allocated memory is still 343.9 MB. Free memory was 321.1 MB in the beginning and 309.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 06:15:42,753 INFO L168 Benchmark]: TraceAbstraction took 109347.53 ms. Allocated memory was 343.9 MB in the beginning and 497.0 MB in the end (delta: 153.1 MB). Free memory was 308.9 MB in the beginning and 386.6 MB in the end (delta: -77.7 MB). Peak memory consumption was 78.6 MB. Max. memory is 16.0 GB. [2021-06-05 06:15:42,753 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 343.9 MB. Free memory is still 324.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.64 ms. Allocated memory is still 343.9 MB. Free memory was 323.4 MB in the beginning and 322.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.37 ms. Allocated memory is still 343.9 MB. Free memory was 322.0 MB in the beginning and 321.1 MB in the end (delta: 982.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 191.80 ms. Allocated memory is still 343.9 MB. Free memory was 321.1 MB in the beginning and 309.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 109347.53 ms. Allocated memory was 343.9 MB in the beginning and 497.0 MB in the end (delta: 153.1 MB). Free memory was 308.9 MB in the beginning and 386.6 MB in the end (delta: -77.7 MB). Peak memory consumption was 78.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 109291.9ms, OverallIterations: 65, TraceHistogramMax: 4, EmptinessCheckTime: 36.8ms, AutomataDifference: 60018.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1312 SDtfs, 8488 SDslu, 14212 SDs, 0 SdLazy, 47481 SolverSat, 4054 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17788.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4260 GetRequests, 814 SyntacticMatches, 135 SemanticMatches, 3311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57379 ImplicationChecksByTransitivity, 64408.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=654occurred in iteration=55, InterpolantAutomatonStates: 2580, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 330.6ms AutomataMinimizationTime, 65 MinimizatonAttempts, 10402 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 168.7ms SsaConstructionTime, 502.1ms SatisfiabilityAnalysisTime, 33818.6ms InterpolantComputationTime, 3377 NumberOfCodeBlocks, 3377 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3250 ConstructedInterpolants, 0 QuantifiedInterpolants, 55612 SizeOfPredicates, 310 NumberOfNonLiveVariables, 2754 ConjunctsInSsa, 1275 ConjunctsInUnsatCore, 127 InterpolantComputations, 3 PerfectInterpolantSequences, 67/1839 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...